Quote from NathanAscher>>

Wave 4 (Round 5)
Poe unarmed1, Attack: 10 Damage: 9
Poe bonus unarmed2, Attack: 18 Damage: 9

Poe hits ST5 and it dies.

ST6 targets Gitra, blood drain Attack: 10 Damage: 4

ST6 misses Gitra

Gitra true strike, Attack: 9 Damage: 5 (fire's burn on hit +7 fire damage)
Gitra channels his clerical spell through pact magic to cast healing word on Gwen as a bonus action for 8

Gitra misses ST6 but manages to heal Gwen

Gwen stands up and casts thunderwave on the remaining monsters for 9 damage. ST5 Constitution Save DC 13 vs 18, ST6 Constitution Save DC 13 vs 3

ST6 fails the Constitution Save and takes 9 damage and dies.

Ooze Lair Rewards
250 XP (83 XP each)
Bonus 100 XP each
62 gp 5 sp (20 gp 8 sp 3 cp each)
Bonus 25 gp each
staff of flowers

Each character gained 50+70+66+83+100 for total adventure XP of 369, reaching level 2.
With the "coin stash 25 cent" rule, each character also has 92 gp 4 sp 9 cp

Not a bad "little adventure." DM note, take advantage of using multiple waves of combat to split the battles up. I made the mistake of taking on all the Bullywugs in the third round of combat. If I had waited until the first wave of Bullywugs had been defeated, things would have been much easier. Since they are mushroom controlled sentries, I'd say they could totally be roaming the cave in singles, instead of groups of two, because they have multiattack this becomes a combat of rolling dice. Singles would make the battle much easier for party's like mine that have medium to low armor class and not so many hitpoints. Additionally, I didn't have to worry about the corrode metal ability of the Psychic Gray Ooze since my characters were armor-less or wearing studded leather armor and using quarterstaffs and unarmed attacks. You could argue that the studs on the studded leather could get corroded but fortunately my party took out the ooze quickly.

1. Justinus Ki, Monk, Guide, Dragonborn Brass
2. Lalravan Core, Paladin, Noble, Aasimar
3. Neo Bizont, Wizard, Sage, Gnome
4. Tyr's Stars
5. The temple of Tyr and Mystra high priestess commissioned a group to apply justice through the realm.  Three initial members were selected.  The great Paladin Lalravan, The guide Monk Justinus, and the wise Sage Neo to venture out and bring those unjust creatures the justice they deserve.  

The Fouled Stream

Introduction
You might hail from a quiet village like Erybend or the bustling mining town of Diamond Lake, or perhaps you make your home in the grand Free City of Greyhawk. Wherever you come from, a young elf woman appears, her face etched with worry and urgency. She approaches you and your companions, pleading for your help. “I beg you,” she says, her voice trembling, “My name is Lyrelle, please follow me upstream. The water is poisoned, and the corruption is spreading. My patron, Borogrove, watches over this forest. He will tell you more.” With a grace that hints at both strength and wisdom, she gestures for you to follow her into the woods, upstream, where a greater mystery awaits.

Meeting the Treant
The forest grows denser as you follow the elf deeper into the woods. Sunlight filters through the branches above, dappling the ground in patterns of gold and green. The air is thick with the earthy scent of moss and pine, though a faint, sour tang lingers beneath it—a reminder of the foulness that has taken hold of the stream.

Ahead, you see a huge figure blending into the trees themselves. As you approach, you realize it is no ordinary tree, but a Treant, ancient and wise. His bark-covered face slowly animates, eyes like pools of deep amber opening to study you with a kindness and strength that feels as old as the forest itself.

"Welcome, travelers," Borogrove’s voice rumbles, low and resonant, like distant thunder. "I am Borogrove, guardian of these woods. Long have I watched over these lands, but now a dark sickness has taken root, poisoned my beloved forest and fouling the waters that flow through your village."

The Treant lifts a massive, branch-like arm and gently drops a small, glistening acorn into the elf's hands, who then offers it to you. "This acorn holds healing and restoration magic,” he says. "You may need it on your journey. Find the source of the corruption and bring balance back to these woods."

Borogrove leans forward, his eyes filled with a mixture of hope and sorrow. "I fear what lies ahead, but the forest has faith in you, as do I. Go now, and tread carefully."

Lalravan replies, "The task will be done Great Borogrove."  The trio bow to the Treant, each accepts the acorn from Borogrove.

Twig Blights (Encounter 1)
As you approach the mouth of a cave, the trees and undergrowth grow thicker and more twisted, their bark marred with patches of fungus and unnatural growth. The once-vibrant forest floor is littered with dead leaves and broken branches, giving the area an eerie stillness. Suddenly, you notice the branches themselves seem to move, shifting subtly as if alive. You blink, but now their twisted forms stand upright, forming rough, humanoid shapes with gnarled limbs and hollow eyes that gleam faintly with an unnatural light. Without warning, they begin to advance, their movements slow but filled with a dreadful purpose.

Set Each Wave to arrive after the first Wave is defeated
Wave 1, 2x Twig Blights CR 1/8 (25 XP each)
Wave 2, 2x Twig Blights CR 1/8 (25 XP each)
Wave 3, 2x Twig Blights CR 1/8 (25 XP each)
Twig Blights Rewards (150 XP, coin stash 37 gp 5 sp)

The groups decide on a default approach of 30ft with Neo and Justinus at 35ft.

Justinus Initiative:6; Lalravan Initiative: 18; Neo Initiative: 11; Talon Initiative: 11; TB1 Initiative: [roll]2]; TB2 Initiative: 4

I did a copy and paste into this by accident...Manually corrected to match inits from below post just for accuracy.

The Trio get the jump on them this wave.

Lalravan Initiative: 18; Neo Initiative: 11; Neo's familiar Talon; Justinus Initiative: 6; TB2 Initiative: 4; TB1 Initiative: 2; 

Rnd 1 Wave 1

Everyone moves up 30ft to melee them. Longsword Attack TB2: 18 Damage: 9 (slashing damage) or half (4); Neo has Talon help him; Neo ACTION: Cast Fire Bolt,  Attack TB2 or next one: 19 Damage: 5 (fire damage 120ft range);  Justinus BA cast Shillelagh.  Action: Attack TB2 or next one: 11 Damage: 9 (Magical Bludgeoning) or half (3); TB2 Attack Lalravan: 17 Damage: Unable to parse dice roll. (piercing damage) or half (0); TB1 Attack Lalravan: 15 Damage: 3 (piercing damage) or half (1)

Lalravan crits TB2 for 10 dmg killing it instantly; Neo hits with fire for 32 dmg killing it

Lalravan Initiative: 18; Neo Initiative: 11; Neo's familiar Talon; Justinus Initiative: 6; TB2 Initiative: 4; TB1 Initiative: 2; 

Just after killing Wave 1 a new set shows up 30ft away.

Init for wave 2

Justinus Initiative: 16; Lalravan Initiative: 8; Neo Initiative: 18; Talon Initiative: 12; TB1 Initiative: 5; TB2 Initiative: 9

Default distance again

 Talon Initiative: 14; Lalravan Initiative: 14; Justinus Initiative: 14; TB1 Initiative: 10; Neo Initiative: 9; Talon Initiative: 14;  TB2 Initiative: 2

Rnd 1 Wave 2

Everyone moves up 30ft to melee them.Talon helps;  Longsword Attack TB1: 19 Damage: 5 (slashing damage) or half (2); Justinus BA cast Shillelagh.  Action: Attack TB1 or next one: 22 Damage: 8 (Magical Bludgeoning) or half (4); TB1 Attack Lalravan: 23 Damage: 6 (piercing damage) or half (3); Neo has Talon help him; Neo ACTION: Cast Fire Bolt,  Attack TB1 or next one: 11 Damage: 15 (fire damage 120ft range);   TB2 Attack Lalravan: 4 Damage: 3 (piercing damage) or half (1); 

Lalravan hits for 5 dmg killing TB1 and Then Justinus kills TB2 with 8 dmg;  The next wave shows up 30ft away.

Wave 3 rnd 1

Justinus Initiative: 8; Lalravan Initiative: 6; Neo Initiative: 12; Talon Initiative: 8; TB1 Initiative: 5; TB2 Initiative: 17

Wave 3 rnd 1

 Lalravan Initiative: 21; TB1 Initiative: 15; Neo Initiative: 14; TB2 Initiative: 14; Justinus Initiative: 12;  Talon Initiative: 7;  

Everyone moves up 30ft to melee them.  Longsword Attack TB1: 16 Damage: 5 (slashing damage) or half (2);

TB1 Attack Lalravan: 9 Damage: 4 (piercing damage) or half (2); 

Justinus BA cast Shillelagh.  Action: Attack TB1 or next one: 22 Damage: 6 (Magical Bludgeoning) or half (3); 

Neo has Talon help him; Neo ACTION: Cast Fire Bolt,  Attack TB1 or next one: 24 Damage: 9 (fire damage 120ft range);   

TB2 Attack Lalravan: 22 Damage: 4 (piercing damage) or half (2); 

Talon helps next round if needed.

Lalravan misses then takes 3 dmg, Justinus kills TB1 7 dmg then Neo kills TB2 14 dmg.

The mop up the twig blights.

Twig Blights Rewards
150 XP (50 XP each)
37 gp 5 sp (12.5 gp each)

They take a short rest. 

Bullywug Warriors (Encounter 2)
Up ahead is a cave opening. The air grows damp and thick as you step into the cave, your footsteps echoing softly off the rough stone walls. The faint sound of water trickling fills the stillness, mingling with an unsettling smell of rot and mildew. The stream you’ve been following is fed by a trickle coming from the cavern, its once-clear water now murky and covered with patches of sickly green and black slime. Around you, strange fungi cling to the walls, casting an eerie glow in shades of blue and green. The air is filled with tiny spores, swirling like dust motes in your torchlight. The whole cave feels wrong, as though the very earth itself has been twisted by some dark, unnatural force. All of a sudden, a large mushroom begins to emit an ear-piercing shriek.

Standard distance 

Wave 1 Rnd 0 

SH1 starts shrieking. Annoyingly so.

Justinus Initiative: 9; Lalravan Initiative: 7; Neo Initiative: 11; Talon Initiative: 16; SH1 Initiative: 0; BW1 Initiative: 7; BW2 Initiative: 18;

SH1 starts shrieking. Annoyingly so.

Lalravan Initiative: 18; Neo Initiative: 18; Justinus Initiative: 7; Talon Initiative: 4; SH1 Initiative: -2; 

Everyone moves up 30ft to melee them.  Longsword Attack SH1: 22 Damage: 6 (slashing damage) or half (3);

Neo has Talon help him; Neo ACTION: Cast Fire Bolt,  Attack SH1 or next one: 21 Damage: 6 (fire damage 120ft range);   

Justinus BA cast Shillelagh.  Action: Attack SH1 or next one: 21 Damage: 7 (Magical Bludgeoning) or half (3); 

Talon helps; 

The Trio take the shrieker down.

Wave 2 round 1

Lalravan Initiative: 18; Neo Initiative: 18; BW2 Initiative: 18;   BW1 Initiative: 13;   Justinus Initiative: 7; Talon Initiative: 4;

Everyone moves up 30ft to melee them.  Longsword Attack BW2: 7 Damage: 9 (slashing damage) or half (4);

Neo ACTION: Cast Fire Bolt,  Attack TB1 or next one: 6 Damage: 6 (fire damage 120ft range);   

BW2 Bite Attack Lalravan: 18 Damage: 4 (piercing damage) or half (2) BU1 Spear Attack: 8 Damage: 6 (piercing damage) or half (3)

BW1 Bite Attack Lalravan: 8 Damage: 5 (piercing damage) or half (2) BU1 Spear Attack: 19 Damage: 5 (piercing damage) or half (2)

Justinus BA TWF Attack BW2 or next: 12 Damage: 3 (bludgeoning damage) or half (1); Action: Attack : Attack: 5 Damage: 6 (Magical Bludgeoning) or half (3)

Talon helps next round if needed.

Wave 2 round 1  Lalraven would have shield of faith on the shrieker fight. AC 20  Lalraven misses and so does Neo. Both BW's miss AC 20.  Justinus misses both attacks as well.

Lalravan Initiative: 18; Neo Initiative: 18; BW2 Initiative: 18;   BW1 Initiative: 13;   Justinus Initiative: 7; Talon Initiative: 4;

Wave 2 rnd 2

Lalravan and Justinus in Melee and Neo 10ft  back;   Longsword Attack BW2: 15 Damage: 4 (slashing damage) or half (2);

Neo ACTION: Cast Fire Bolt,  Attack BW2 or next one: 17 Damage: 9 (fire damage 120ft range);   

BW2 Bite Attack Lalravan: 12 Damage: 4 (piercing damage) or half (2) BU1 Spear Attack: 9 Damage: 4 (piercing damage) or half (2)

BW1 Bite Attack Lalravan: 9 Damage: 4 (piercing damage) or half (2) BU1 Spear Attack: 12 Damage: 3 (piercing damage) or half (12)

Justinus BA TWF Attack BW2 or next: 9 Damage: 4 (bludgeoning damage) or half (2); Action: Attack : Attack: 14 Damage: 7 (Magical Bludgeoning) or half (3)

Talon helps next round if needed.

Wave 2 round 2  Lalraven would have shield of faith on the shrieker fight. AC 20  Lalraven misses and so does Neo. Both BW's miss AC 20.  Justinus misses both attacks as well.

Lalravan Initiative: 18 (7/12); Neo Initiative: 18 (8/8); BW2 Initiative: 18 (1/11);  BW1 Initiative: 13 (11/11);   Justinus Initiative: 7 (10/10); Talon Initiative: 4 (1/1);

Wave 2 rnd 3

Con save for Lalravan to keep shield of faith active 21 vs DC 10 or AC 18 then shield of faith.

Lalravan and Justinus in Melee and Neo 10ft  back;   Lalravan will BA Lay on hands for 5 hp; Longsword Attack BW2: 16 Damage: 7 (slashing damage) or half (3);

Neo ACTION:Cast Burning Hands,  Burning hands level 1 Damage: 11 (Fire Damage DC 13 Dex) or half (5)  Enemy save attempt BW2 19; BW1 21; 

BW2 Bite Attack Lalravan: 10 Damage: 3 (piercing damage) or half (1) BU1 Spear Attack: 10 Damage: 3 (piercing damage) or half (1)

BW1 Bite Attack Lalravan: 11 Damage: 4 (piercing damage) or half (2) BU1 Spear Attack: 15 Damage: 2 (piercing damage) or half (1)

Justinus BA TWF Attack BW2 or next: 23 Damage: 4 (bludgeoning damage) or half (2); Action: Attack : Attack: 5 Damage: 10 (Magical Bludgeoning) or half (5)

Talon helps next round if needed.

Wave 2 round 3  Lalraven saves vs concentration; Heals for 5 to max and hits BW2 killing it'. Neo's burning hands does 5 to both as both save but BW2 was dead already;  BW1 misses.  Justinus hits with TWF for 4 dmg.

Lalravan Initiative: 18 (7/12); Neo Initiative: 18 (8/8); BW2 Initiative: 18 (Dead/11);  BW1 Initiative: 13 (2/11);   Justinus Initiative: 7 (10/10); Talon Initiative: 4 (1/1);

Wave 2 rnd 4

Lalravan and Justinus in Melee and Neo 10ft  back;   Longsword Attack BW1: 21 Damage: 5 (slashing damage) or half (2);

Neo ACTION: Cast Fire Bolt,  Attack BW1 or next one: 16 Damage: 10 (fire damage 120ft range);   

BW1 Bite Attack Lalravan: 10 Damage: 2 (piercing damage) or half (1) BU1 Spear Attack: 5 Damage: 3 (piercing damage) or half (1)

Justinus BA TWF Attack BW2 or next: 20 Damage: 4 (bludgeoning damage) or half (2); Action: Attack : Attack: 24 Damage: 16 (Magical Bludgeoning) or half (8)

Talon helps next round if needed.

Wave 2 round 4  Lalraven  hits BW1 killing it'. Neo's burning hands does 5 to both as both save but BW2 was dead already;  BW1 misses.  Justinus hits with TWF for 4 dmg.

Lalravan Initiative: 18 (7/12); Neo Initiative: 18 (8/8); BW2 Initiative: 18 (Dead/11);  BW1 Initiative: 13 (dead/11);   Justinus Initiative: 7 (10/10); Talon Initiative: 4 (1/1);

Set Each Wave to arrive after the first Wave is defeated
Wave 1, 1x Shriekers CR 0 (10 XP each)
Wave 2, 2x Bullywug Warriors CR 1/4 (50 XP each)
Wave 3, 2x Bullywug Warriors CR 1/4 (50 XP each)
Bullywug Rewards (210 XP, coin stash 52 gp 5 sp)

Wave 3 Rnd 0

Justinus Initiative: 13; Lalravan Initiative: 17; Neo Initiative: 21; Talon Initiative: 8; BW1 Initiative: 17; BW2 Initiative: 4;

Wave 3 Rnd 1

Neo Initiative: 21; Lalravan Initiative: 17; BW1 Initiative: 17; Justinus Initiative: 13; Talon Initiative: 8;  BW2 Initiative: 4;

Neo ACTION: Cast Fire Bolt,  Attack BW1 or next one: 18 Damage: 13 (fire damage 120ft range);   

Lalravan and Justinus in Melee and Neo 10ft  back;   Longsword (SAP) Attack BW1: 5 Damage: 9 (slashing damage) or half (4);

BW1 Bite Attack Lalravan: 23 Damage: 3 (piercing damage) or half (1) BW1 Spear Attack: 11 Damage: 3 (piercing damage) or half (1)

Justinus BA TWF Attack BW1 or next: 19 Damage: 8 (bludgeoning damage) or half (4); Action: Attack : Attack: 22 Damage: 3 (Magical Bludgeoning) or half (1)

Talon helps next round if needed.

BW2 Bite Attack Lalravan: 8 Damage: 3 (piercing damage) or half (1) BW1 Spear Attack: 12 Damage: 5 (piercing damage) or half (2)

Wave 3 Rnd 1 Neo kills BW1 with the first shot leaving the others to deal with BW2; Lalravan misses and with BW1 dead Justinus hits for 4 dmg to BW2 and BW2 misses;

Neo Initiative: 21; Lalravan Initiative: 17; BW1 Initiative: 17; Justinus Initiative: 13; Talon Initiative: 8;  BW2 Initiative: 4 (11/11);

Wave 3 Rnd 2

Neo ACTION: Cast Fire Bolt,  Attack BW2 or next one: 19 Damage: 11 (fire damage 120ft range);   

Lalravan and Justinus in Melee and Neo 10ft  back;   Longsword (SAP) Attack BW2: 14 Damage: 7 (slashing damage) or half (3);

Justinus BA TWF Attack BW1 or next: 11 Damage: 4 (bludgeoning damage) or half (2); Action: Attack : Attack: 14 Damage: 10 (Magical Bludgeoning) or half (5)

Talon helps next round if needed.

BW2 Bite Attack Lalravan: 18 Damage: 4 (piercing damage) or half (2) BW1 Spear Attack: 5 Damage: 2 (piercing damage) or half (1)

Neo drops BW2 saving the day.  Whew..those could be fatal my friends.

Wave 1, 1x Shriekers CR 0 (10 XP each)
Wave 2, 2x Bullywug Warriors CR 1/4 (50 XP each)
Wave 3, 2x Bullywug Warriors CR 1/4 (50 XP each)
Bullywug Rewards (210 XP, coin stash 52 gp 5 sp)

Bullywug Warriors Rewards
210 XP (70 XP each)
52 gp 5 sp (17 gp 5 sp each)

The Trio head to town to reset there stuff for a fresh start.

After a rest the group head back to the cave.

Berserk Bear (Encounter 3)
The tunnel opens into a small, dimly lit chamber where the damp air is even heavier with the stench of rot. A large brown bear paces erratically near a shallow pool fed by the corrupted stream, its massive paws leaving muddy prints across the stone floor. The bear’s fur is matted and tangled with patches of mold, and its eyes are wild, bloodshot, and pained. It stops suddenly, turning toward you with a guttural growl. Drool tinged with a sickly green hue drip from its mouth, and it sways unsteadily as though the poisoned water has left it both enraged and confused.

Justinus Survival:  7; Lalravan Medicine:  10; Neo Nature:  19 vs DC15 to know that the bear suffers from the poisoned condition.

LOL my best rolls should have been Survival at +4 and Nature at +3 lol but Lalravan with a straight roll wins the day.

The trio get a ration and put the acorn in it and toss it to the bear.  It takes the bait and swallows the food and instantly gets better leaving the group alone.

1x Brown Bear CR 1 (200 XP each)
Brown Bear Rewards (200 XP, coin stash 50 gp)

Brown Bear Rewards
200 XP (66 XP each)
50 gp (16 gp 6 sp 6 cp each)