Sir Aarlin attacks and deals fire damage and a multitude of other damages.  One of the Hydra head dies as a result.

Sir Xalbar is up:

MOVE: Sir Xalbar stays put 30 ft from the Hydra; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Cast Eldritch Cannon: Force Ballista, targeting Hydra Damage: 6 (Force Damage)
ACTION: Cast Magic Missile, Damage: 5 (Force) + 5 (Force) + 3 (Force) + 3 (Force) + 3 (Force) = 19

End of turn!

Reaction: Opportunity attack and/or Absorb Elements

Sir Xalbar continues to beat the Hydra with force form Magic Missiles;

Sarran is up:

MOVE: Sarran runs 25 ft south to engage the Hydra, (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Spend 1 Ki pt for Flurry of Blows All attacks at the Hydra ; Unarmed attack#1: 23 Damage: 9 (Bludgeoning); Unarmed attack#2: 13 Damage: 12 (Bludgeoning)
ACTION: Claw #1 Attack: 15 Damage: 11 (Slashing); Claw #2 Attack: 10 Damage: 12 (Slashing)

Open Hand Technique Whenever you hit with one of your Flurry of Blows attacks, you can impose one of the following effects on that target: fall prone if it fails a DEX saving throw (DC 15), get pushed up to 15 ft. if it fails a STR saving throw (DC 15), or it can't take reaction until the end of your next turn.

 Drider save vs Dex DC 15 or be prone 15

 6 ki points left. End of turn!

Reaction:  Any available 

Sarran hits the Hydra with 2 of his attacks forcing it to save vs Dex and it fails and goes prone.

Priphira is goes:

MOVE: Priphira moves 25 ft by the Hydra: (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Bardic inspiration for the others.  Once within the next 10 minutes, the creature can roll the die and add the number rolled to one ability check, attack roll, or saving throw it makes.
ACTION: Cast Faerie Fire, at the Hydra;  Save vs Dex 15 or everyone has advantage on the Hydra;  Hydra sv 19

End of turn!

Reaction:  Any available

The hydra will attack 1 or 2 of the three closest targets.

1 1 = SA, 2= Sar, 3=Pri first attack..Second attack is 3 1 = SA, 2= Sar, 3=Pri 

The hydra will attack 1 or 2 of the three closest targets.

3 1 = SA, 2= Sar, 3=Pri first attack..Second attack is 3 1 = SA, 2= Sar, 3=Pri 

Priphira gets bite hard after the Hydra uses half it's movement to stand. 15 hp

Sarran gets bit by the other head with a graze. 7 hp

Zavier is up: 

MOVE: Zavier Stays back with Sir Xalbar but moves to be 30 ft east of him; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Cast HEX, on the Hydra Disadvantage on DEX saves
ACTION: Cast Eldritch Blast, same target Attack: 11 Damage: 14 (Force) + 4 (Necrotic) + 14 (Force) + 5 (Necrotic) = 37

Reaction:  Opportunity attacks or any available.

Zavier's attack misses as the Hydra dodges the beams swinging it's body like a nimble ninja might..

Sir Arrlin is up:

MOVE: Sir Aarlin stay by the Hydra; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Hexblade's Curse targeting Hydra

ACTION: Cast Green Flame Blade, Hydra with no flame on extra enemy Attack: 28 Damage: 14 (Longsword of Life Stealing) + 12 (Fire Green Flame Blade) + 27 (Radiant Divine Smite) + 5 (Necrotic Hex) + 11 (Slashing Brakish Audacity) = 69

Sneak Attack; 6 on hydra

End of turn!

Reaction:  Opportunity Attack

Sir Xalbar is up:

MOVE: Sir Xalbar stays put 30 ft from the Hydra; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Cast Eldritch Cannon: Force Ballista, targeting Hydra Damage: 9 (Force Damage)
ACTION: Cast Magic Missile, Damage: 5 (Force) + 4 (Force) + 5 (Force) + 3 (Force) + 2 (Force) = 19

End of turn!

Reaction: Opportunity attack and/or Absorb Elements

Sarran is up:

MOVE: Sarran runs 25 ft south to engage the Hydra, (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Spend 1 Ki pt for Flurry of Blows All attacks at the Hydra ; Unarmed attack#1: 17 Damage: 6 (Bludgeoning); Unarmed attack#2: 21 Damage: 11 (Bludgeoning)
ACTION: Claw #1 Attack: 9 Damage: 6 (Slashing); Claw #2 Attack: 22 Damage: 8 (Slashing)

Open Hand Technique Whenever you hit with one of your Flurry of Blows attacks, you can impose one of the following effects on that target: fall prone if it fails a DEX saving throw (DC 15), get pushed up to 15 ft. if it fails a STR saving throw (DC 15), or it can't take reaction until the end of your next turn.

 Drider save vs Dex DC 15 or be prone 2

 5 ki points left. End of turn!

Reaction:  Any available 

Priphira is goes:

MOVE: Priphira stay by the Hydra: (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Cast Healing Word; 6 on Priphira
ACTION: Robe of Stars on Hydra Damage: 5 (Magic Missile force damage Hydra) + 5 (Magic Missile force damage Hydra) + 5 (Magic Missile force damage Hydra) + 5 (Magic Missile force damage Hydra) + 5 (Magic Missile force damage Hydra) + 4 (Magic Missile force damage Hydra) + 5 (Magic Missile force damage Hydra) = 34

End of turn!

Reaction:  Any available

The onslaught from the first four completely pulverized the Hydra and burned it to a crisp.  The second head fell off as well.   End Encounter.

It startes getting dusk and you are getting ready to cam[[[p when a hailstorm starts heading your way as you see and hear it you have time for one action.

Sarran says let this effect happen everyone.  he drops a Bead of force.  Everyone takes 5d4 force  18.

Everyone takes 18 damage and after 4 rnds the storm is over.  The bead lasts another 6 rnds then dissipates.  You set up camp and take a long rest.  Heal up and no other encounters for the night.

Zavier will do his coffelock deal.....I'll research that a bit too.  Found some info....From another post in a different forum by someone else....

So I have made my own Coffeelock for use in my D&D game (I am the DM; it is a DMPC), and I want to point out that specifically, you can do the following: every time you take a short rest, you regain warlock spell slots, then you can convert those to sorcery points, then again to sorcerer spell slots; there is no limit to sorcerer spell slots specifically stated in the PHB. I think you should specifically state that you can bank the created sorcerer spell slots.

For Zavier it's take 2 warlock 2nd level spell slots and convert to 2 Sorcery points out of 3..Short rest get 2 warlock point back. Convert to last sorcery point now 3..Convert the 3 sorcery points to a Warlock Spell slot..Now 3 slots with one still not converted.  Convert last warlock spell slot to sorcery point Convert 3 sorcery points to a level 2 Warlock slot (now 3 slots) and rest to get warlock points back 3 now.  Convert 3 warlock point to 3 sorcery points and create a 2nd level warlock spell slot.  You must do 1 hour of work to interrupt an 8 hour rest so you don't inadvertently take a long rest. The mechanic of converting Warlock spells to Sorcery points might be a problem..The warlock at level 2 Sorc level 3 may not have the ability to convert Warlock level 2 spell slots to Sorcerey points. It takes three 2nd level spells slots 

Converting a Spell Slot to Sorcery Points. As a bonus action on your turn, you can expend one spell slot and gain a number of sorcery points equal to the slot’s level.  Ok so with this you could convert 2 spell slots to 2 sorcery points rest then do 1 point to fill up the sorcery points to get a Warlock 2nd level spell slot.  Now you are at 3 warlock 2nd level slots and from here on it's one to one conversion per rest.  Sorcery slots won't increase until you level up.

I'll take a day or two to set up some more encounters for the group.  Give me a bit to get it situated. 

The group take a long rest for Priphira, Sarran, Sir Aarlin and Sir Xalbar while Zavier does several Short rests and some work at the 7 hr mark to have an hour of work to prevent a long rest.  You pack up camp although Zavier has a 1hr head start on packing up.  You head out again with Sir Aarlin in the lead and Jivet flying ahead about 300 ft. After about an hour.

The road passes through a denser part of the forest.

Initiatives as Sir Aarlin yells to arms....preventing a surprise as the trees are coming to life.  5 Awakened Trees come to life 15 ft away surrounding you.  3 on the north side of the road and 2 on the south side of the road.  Jivet flew on by and is 300 ft to the west from the group.  Time 7:30:00

Pri 23

SA 18

AT E 17

AT B 13

ZA 10

SAR 8

AT C 6

SX 5

AT D 2

AT A 1

Priphira and Sir Aarling are up:

Priphira is goes:  Time 7:30:00.  Bardic until 7:40:00

MOVE: Priphira moves 10ft runs North to engage AT A: (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Bardic inspiration for the others.  Everyone has inspiration 1d6 for one atk, save or skill for 10 min.
ACTION: Robe of Stars at AT A Damage: 24

End of turn!

Reaction:  Any available

Sir Aarlin is up:

MOVE: Sir Aarlin Move 10 ft to the middle AT B in the northern group; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Cast Hex on AT B and they have DEX disadvantage.
ACTION: Cast Green Flame Blade, at AT B; Attack: 21 Damage: 9 (Slashing) + 8 (Fire) + 1 (Radiant Divine Smite) + 5 (Sneak Slashing) + 2 (Necrotic) = 25

20 Green fire damage on AT A

End of turn!

Reaction:  Opportunity Attack

Priphira sings a lovely tune granting all a bardic dice for 1d6 boost 1 time in the next 10 min.  She takes a star off her robe and sends it at AT A damaging it.   Sir Aarlin attacks AT B with a green flame blade inflicting damage and sends a flame over to AT A and nearly brings it down after Priphira's attack.  AT B attacks Sir Aarlin and misses.  AT E attacks Zavier and Misses.

Sarran and Zavier are up:  I'll roll for Sarran and give Zavier a 24 hour window to attack if they have time.

Sarran is up:

MOVE: Sarran runs 10 ft north to attack AT C, (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Spend 1 Ki pt for Flurry of Blows All attacks at the AT C ; Unarmed attack#1: 15 Damage: 7 (Bludgeoning); Unarmed attack#2: 22 Damage: 6 (Bludgeoning)
ACTION: Claw #1 Attack: 23 Damage: 12 (Slashing); Claw #2 Attack: 25 Damage: 12 (Slashing)

Open Hand Technique Whenever you hit with one of your Flurry of Blows attacks, you can impose one of the following effects on that target: fall prone if it fails a DEX saving throw (DC 15), get pushed up to 15 ft. if it fails a STR saving throw (DC 15), or it can't take reaction until the end of your next turn.

AT C save vs Dex DC 15 or be prone 9

6 ki points left. End of turn!

Reaction:  Any available 

Zavier is up: 

MOVE: Zavier Stays back moves south diagonally to be west of AT D by 45 ft; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Cast HEX, on the AT D, Disadvantage on DEX saves
ACTION: Cast Eldritch Blast, same target Attack: 13 Damage: 10 (Force) + 5 (Necrotic) + 14 (Force) + 2 (Necrotic) = 31

Reaction:  Opportunity attacks or any available.

Zavier blows some bark off of AT D and AT C attacks Sarran in retaliation for his assault hitting Sarran.

Sir Xalibar is up:

MOVE: Sir Xalbar stays put 15 ft from the AT E; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Use Eldritch Cannon: Force Ballista, targeting AT E Damage: 16 (Force Damage)
ACTION: Cast Magic Missile, at AT E; Damage: 5 (Force) + 4 (Force) + 5 (Force) + 3 (Force) + 4 (Force) = 21

End of turn!

Reaction: Opportunity attack and/or Absorb Elements

Sir Xalbar blows bark off of AT E and AT D unable to get to Zavier moves toward Sir Xalbar but can't get all the way there.  AT A attacks Priphira and connect for damage.

Round 1 is over.  Round 2 turn 1 puts

Priphira and Sir Aarlin up:

Priphira is up:

MOVE: Priphira stay by AT A: (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Two Weapon Fighting. Moon touch Rapier Attack AT A: 23! Damage: 5
ACTION: Rapier+1 Attack AT A: 9! Damage: 5

End of turn!

Reaction:  Any available

Sir Aarlin is up:

MOVE: Sir Aarlin stays put near Bugbear A, Bugbear Chief (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: None
ACTION: Cast Green Flame Blade, at AT B with extra Green Flame Blade Damage on AT A: 18 Damage: Unable to parse dice roll. (Slashing) + 1 (Divine) + 2 (Green Flame) + 4 (Necrotic) + 6 (Sneak attack Slashing damage) = 13  Damage: 9 (Green flame on AT A)

End of turn!

Reaction:  Any available

Priphira does a little damage to AT A as the Awakened Trees are resistant to Bludgeoning and Piercing damage, so her rapiers only do 1/2 damage.  Sir Arrling does some better damage only slightly and also sends flames at AT A to assist Priphira.  AT B didn't like that and attacked Sir Aarlin and connected.  AT E connected against Sir Xalbar as well.

Sarran and Zavier are up:

Sarran is up:

MOVE: Sarran stays put to engage the AT C, (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Spend 1 Ki pt for Flurry of Blows All attacks at the AT C; Unarmed attack#1: 12 Damage: 4 (Bludgeoning); Unarmed attack#2: 26 Damage: 4 (Bludgeoning)
ACTION: Claw #1 If C dies then attack AT A: 18 Damage: 7 (Slashing); Claw #2 If AT C dies then attack AT A unless it's dead then attack AT B: 15 Damage: 11 (Slashing)

Open Hand Technique Whenever you hit with one of your Flurry of Blows attacks, you can impose one of the following effects on that target: fall prone if it fails a DEX saving throw (DC 15), get pushed up to 15 ft. if it fails a STR saving throw (DC 15), or it can't take reaction until the end of your next turn.

AT C, A, B if attacked. or next target save vs Dex DC 15 or be prone 16

 5 ki points left. End of turn!

Reaction:  Any available 

Sarran connects with all the attacks on AT C but C has resistance two the first two attacks.  Fortunately Sarran crits on the first attack.  Sarran almost drops AT C but isn't able to assist Priphira.

Zavier is up: 

MOVE: Zavier Stays put out of range from retaliation (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Meta feat Quicken spell; Cast Eldritch Blast, by making it a Bonus Action spell…Rolled in action.  

Eldritch Blast Attack Beam #3 at; AT A, B, C, D, E as needed to drop them quickly: 27! Damage: 11

Eldritch Blast Attack Beam #4 at; AT A, B, C, D, E as needed to drop them quickly: 23! Damage: 14

ACTION: Cast Eldritch Blast, 

Eldritch Blast Attack Beam #1at; AT A, B, C, D, E as needed to drop them quickly: 24! Damage: 6

Eldritch Blast Attack Beam #2at; AT A, B, C, D, E as needed to drop them quickly: 15! Damage: 6

Reaction:  Opportunity attacks or any available.

Zavier blow the bark off of three of the Trees killing 2 and nearly killing a third one.

Sir Xalbar is up:

MOVE: Sir Xalbar move 5 ft forward (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: Cast Eldritch Cannon: Force Ballista, targeting AT D  Damage: 2 (Force Damage)
ACTION: Cast Ray of Frost,  Attack or AT B or E: 13 Damage: 11 (Cold Damage speed reduced 10 ft)

End of turn!

Reaction: Opportunity attack and/or Absorb Elements

Sir Aarlin is up:

MOVE: Sir Aarlin stay by AT B with Advantage; (spending 30 feet of movement; first diagonal costs 5 ft. of movement, second costs 10 ft., third costs 5 ft., etc.)
BONUS: None
ACTION: Cast Green Flame Blade, at AT B with extra Green Flame Blade Damage on AT A: 28 Damage: Unable to parse dice roll. (Slashing) + 4 (Divine) + 4 (Green Flame) + Unable to parse dice roll. (Necrotic) + Unable to parse dice roll. (Sneak attack Slashing damage) = Unable to parse dice roll.  

End of turn!

Reaction:  Any available

The duo takes down the second to last tree.  The last tree AT E begs for mercy in common.

The group scoots it on its way.

You start taking stock of your situation and before you know it 24 seconds later 4 mummies appear 30 ft to the west.

I'll roll initiatives: