Maxx lets out a cry as she charges forward, her rapier in hand. "Alright you poor excuse for a snake! Face our wrath!" She attacks the Serpent Warrior. 
(Rapier Attack: Attack: 9 Damage: 10)

The warrior easily dodges and slides out of the way of Maxx and Cathbad's attacks smirking as he does so. 

Con Save: 18

The Serpeat smiles as his armors heats up, "The heat feels good to my cold bold!" Despite his words you see his scales blistering under the armor.

He returns fire on Maxx who bravely rushed in and is the closest combatant to him, however he sneers at Daventry, "Your time will come soon" He pushes her into the snake pit

Athletics Check: 27 Make a athletics or acrobatics check DC is whatever I just rolled. 

On a fail you will fall 20 feet into the pit taking 5 Fall Damage and be prone in the snake pit.

If Maxx fails then he'll move to engage Daventry if not he will stay where he is.

Dandelion will move to just inside the room and again use her sacred flame

Combat Tracker:

Attack 15 Damage: 3

I'll roll Maxx's save so we can keep combat moving. 

Maxx Dex Save: 6

Maxx goes tumbling into the pit of snakes cracking her should hard off the wall on her way down. "Death, I can see it...." She mumbles to herself as she lies on writhing mass. With Maxx in the pit the warrior rushes forward to confront Daventry. 

The walls of the pit are very smooth and polished so the snakes can not slide out. It will be very challenging to climb out unaided (DC15 Athletics) At the start of Maxx's turn she will be attacked by a swarm of poisonous snakes. Any creature in the pit at the start of their turn will be attacked, the swarm does not act on an initiative. 

Dandelion's flame finally hits something, the snake hisses, "YOU! You are next filthy creature."

All PC's and Minions may go!

Combat Tracker:

• Ludolf and Cathbad (23)
• Triäsa and Maxx (11) Prone in snake pit, probably bad
• Serpent Warrior (35)
• Dandelion (4)
• Daventry and Gunnar
• Pardot

Map

Ludolf hurries over to the large viper pit and uses his telekinetic powers to lift the tiefling towards him, Cathbad hurrying over by his side to help Maxx up with his rope, desperately promising to never drink again if she only makes it back up to him. 

(LOL) Maxx can have advantage on her check to get out of the pit and with Ludolf's action the snakes will not be able to attack her. A good plan!

Daventry stands ready to enact her plan, to draw the serpent warrior into her desired position instead of his, so that no one can get thrown into a pit of certain death.

Then she watches in almost stunned silence as the tiefling charges in and is summarily tossed directly into a pit of certain death. "No, wait!" she gets out before Maxx disappears and the warrior slithers up to her... she can't help but curse in dwarvish. <"Thock runack!">

Translation:

Now harried by the warrior's presence, she can't lose focus, wishing desperately that she had a way to get her rope of climbing to her friends. Deal with the one threat first, and hope that someone else can save the suicidal tiefling from herself.

"Gunnar! On me!" Dav shouts as she tests her foe's defenses with two quick thrusts of her rapier.

Attack 1: 22 to hit, 9 damage

Attack 2: 15 to hit, 15 damage

Aura of Protection: Allies w/in 10 feet get +2 to saving throws

Gunnar gives a glorious battlecry and charges the warrior, fighting aside Daventry with axe in hand.

Attack 1: 18 to hit, 9 damage

Attack 2: 10 to hit

Gunnar Reaction: Protection, first attack against an ally within 5 feet made at disadvantage

Daventry Reaction: Sentinel (if anyone else is attacked or the serpent tries to disengage)

Maxx is a little bit surprised by her sudden turns of fortune. She tries to grasp the rope Cathbad is throwing to her to climb out. (Athletics: 12)

Rapier and axe dance again each of the paladins landing their first blow and missing their second. Black blood runs from the Ultimate Serpent Warrior. He grins.

Meanwhile Maxx tries to climb out of the hole. She is unfortunately unable to get to the top but hovers precariously halfway. DC10 Athletics check to get the rest of the way out on her next turn. She has the rope and so you still have advantage If she rolls <5 she falls back into the pit. Seems unlikely...

Triäsa and Pardot are up!

Combat Tracker

• Ludolf and Cathbad (23)
• Triäsa and Maxx (11) hanging by a thread
• Serpent Warrior (53)
• Dandelion (4) concen: PWT
• Daventry and Gunnar
• Pardot

Triäsa continues to keep the serpent's armor heated (10 fire damage: DC 15 CON Save or Disadvantage on all attacks)

She then aims her Force Bolt at the Serpent Warrior.

(Spell Attack: 26 Damage: 15)

Hoping to get moving soon, Pardot attempts to light the snake up with another bolt

Attack: 28 Damage: 12 + adv on next attack if hits

The creatures armor glows hotter and you can see the warrior struggle under the heat.

Con Save: 5

The twin bolts of arcane energy strike it soundly one to each shoulder. It spits blood and curses you in common, "You can't stop it... Yig will rise and you can not stop. You were to be reborn in his light and devour the world with us but you choose to die. Gehir will see to that." The creature looks like it is about to die but there is no fear in it's eyes.

The creature ignores the pain and swings its battleaxe twice at Daventry.

Attack 1: 16 Damage: 6 Con Save DC 15 take 8 on fail, half as much on success.

Attack 2: 26 Damage: 7 Con Save DC 15 take 8 on fail, half as much on success.

Dandelion moves to the north where the team is trying to get Maxx out of the hole and holds her action.

All PC's are up.

Combat Tracker:

• Ludolf and Cathbad (23)
• Triäsa and Maxx (11) hanging by a thread
• Serpent Warrior (83)
• Dandelion (4) concen: PWT
• Daventry and Gunnar
• Pardot

Daventry drives her blade deep, pinning him in place with her rapier. (One to-hit 26, 13 damage)

"I have already been reborn, in a form beyond my wildest dreams. You, however, will only exist in the void, a worse nightmare. You will see nothing but darkness."

She nods to Gunnar, who swings his battleaxe in a decapitation blow. (One to-hit 26, 10 damage)

It doesn't look like the attacks on Dav rolled with disadvantage so second rolls here.

10 14

Daventry mortally wounds the creature who hunches over bleeding. Gunnar doesn't miss his opportunity and swings his new ax with an unnecessary amount of force decapitating the Serpent Warrior.

You are out of combat.

Dandelion paces near the pits, "Let's go time is wasting. If what this thing said is true and Yig is being brought forward your window for escape is closing. We stand no chance against the Old Enemy... Two doors... East or west. Let's move." You get a true sense of fear from the creature as it speaks of Yig

Dandelion seems to give no regard to Maxx who is hanging on a rope in a pit of snakes

Daventry uncoils Thavol's multicolored rope from where it was tied on her belt, and says the command words to activate it. "Far out, man."

Then, she commands the rope to knot up and tie itself around Maxx like a sling. Daventry looks to Gunnar, "Let's get her out, yeah?"

(Use the rope like a rescue sling, so that instead of Maxx having to hold on or climb, the rest of the entire group can pull her out)

Gunnar Athletics: 23 + 3 guidance

Cathbad and Ludolf helps however they can to get Maxx out of the pit, the old man giving the corpse of the fallen serpentfolk warrior a glare with his piercing gray eyes. Once Maxx is up and in Cathbad's comforting arms, Ludolf turns to Daventry. "The cat is right, we must hurry." He says sternly, ready to follow the others out of this poisonous place.