Quote from Oberon99 >>

Ludolf blasts the pureblood and runs away, heavily wounded, hiding in a prone position behind Pardot and behind the hut, hopefully in full cover now, regretting the silly trick with the illusion.

Eldritch Blast: 23 Force: 15
Eldritch Blast: 13 Force: 6

 Your first blast will kill the PB would you like to redirect the second one.

(Yes, Malison 1 will do nicely)

The party's retribution is swift and the combined attacks from the three of you lash out quickly obliterating the poor snake lady. Ludolf's second blast grazes Malison 1 in the shoulder drawing dark red snake blood. It is at this point Ludolf notices the acid from Priests spell still burns as it eats away at the skin of your arm causing further injury before it finally wears off

Acid Arrow Damage 6 (Acid arrow is a bit of a nasty spell)

Malison 1 charges forward 30 feet without any fear. He spies Daventry in her perch and with a sly smiles wiggles his snake-like hips and hisses, "Climb on down from there my love and bring your lady friend to me." He sneers casting Suggestion  DC 13  Wisdom Saving Throw.

The Old Man seeing the violence his minions have already caused calls out desperately in abyssal, "You fools don't kill them here! They are the sacrifce!"

Translation for the abyssal

 Pardot is up

Combat Tracker

Daventry Wis Save: 17

Daventry feels the spell begin to dig into her mind, and a part of her knows that were she still thrall to that tome, her resolve would have waivered. Not anymore.

Still, though, can't hurt to play along a moment...

"Climb... down... of course..." she says almost trancelike.

Deception: 18

Concentrating to activate his star archer, Pardot pops just a bit out from where he'd been hiding and looses a star arrow, and then a spell off towards the slightly injured Malison.

Malison 2 moves forward next to his brother. He looks at Daventry and considers shooting an arrow... But does not want to disrupt the charm

Insight: 8

Before I post any further please look at the updated map and tell me if everyone is OK with these positions. Pardot, Ludolf and Triäsa have full cover from the Malisons and half cover from the others. 

(OK here we go. Hopefully no more prolong interruptions for about a week but you never know...)

Pardot's starlight crashes into Malison 1, it's skin burns and crusts from the energy. He calls out in anger, "You'll be the first I consume when we reclaim our world hafling." The familiar stardust falls from Pardot's star and descends on the three newcomers attempting to illuminate their hideous forms. The magic seems to struggle to take hold as the three innately fight the spell.

• Priest Dex Save  Unable to parse dice roll.
• Old Man Save Unable to parse dice roll.
• Warrior Save Unable to parse dice roll.

The second malison fooled by Daventry's act says to his brother in abyssal, "Good work brother I shall take the building from the south you head to the north." He then uses the remainder of his action to dash around the corner. After his movement Malison 1 calls back, "The charm did not hold you fool!"

As the round starts at the top you all hear an uncomfortable hissing and slithering sounds from the fog behind you. It seems the ground crawls with thousands of snakes behind you as well. Probably not good....

The old man continues to walk slowly, purposefully forward 30 feet he calls out in common, "Throw down your weapons. You can not win. Come to the temple and become a willing sacrifice. We will celebrate you for all eternity as we feast on your world!" He does nothing else.

The priest sneers as she walks calmly forward 30feet and lets loose a second acid arrow, this one aimed at Daventry on the roof. 

Attack 19 Damage: 11 (Half Damage on a miss) On a hit you take 5 at the end of your next turn also.

The warrior runs forward and fires his bow twice at Pardot

Attack 1: 21 Damage: 8 DC 13 Con save or take 9 You take half on a success.

Attack 2: 22 Damage: 4 DC 13 Con save or take 6 You take half on a success.

Translation:

rerolling the dex saves....

• Priest Dex Save  17
• Old Man Save 14
• Warrior Save 17

The priest and the warrior glow faintly in starlight. As the magic falls on the Old Man he simply sighs and waves his hand. The magic has no effect on him as he uses a Legendary Resistance.

Map:

 All PCs are up! Make it count!!

Combat Tracker -- For ease I moved Malison 1 down after Pardot. Hope thats OK with everyone.

The acid arrow sizzles just in front of Daventry, the cover provided by her position on the roof the only thing that saved her from the brunt of the spell (20 AC with half cover...) Still, some of the acid splashes onto her.

Concentration: Nat 1

The strange simmering shield around her fizzles and fades.

She lets loose two arrows from her bow at the priest, returning fire.

Attack 1: 20 to hit, 7 damage

Attack 2: 10 to hit, 8 damage

She grabs her shield in her off hand and slips down off the roof, taking a defensive position 10 feet south of Ludolf.

"Ideas?! I'm running out..." she hisses at her friends.

Stunned by the arrows, Pardot quickly fires a guiding bolt, and then a star arrow at the injured Malison, hoping at least to reduce their numbers as quickly as possible. He then ducks behind the hut hoping for some cover.

Ludolf notices the mass of writhing snakes appearing behind them too and realizes their near hopeless situation, throwing Triäsa a glance of worry. "Get into cover and heal yourself." He says quietly, then peeking out to the south of the hut, catching sight of an abomination, blasting it with gray crackling eldritch force, then taking full cover behind the hut again in a prone position.

Eldritch Blast: 20  Force: 14
Eldritch Blast: 26  Force: 9
+5 psychic from Maddening Hex

Your attacks bravely sail at your enemies! Daventry's first arrow grazes the priests should drawing dark black blood, the second flies wide. The combined eldritch and starlit magics from Pardot and Ludolf are enough to drop Malison 1!

The Old Man again calls out to you, "You are fools, you stand before The Chosen of an Elder God! We shall end this charade soon. Come out and bow down to your new Lord! Be the sacrifice that will usher in the glory of a new age!" Sensing your defiance as Malison 1 falls he calls out again "Witness but a taste of my power"

As a legendary action he begins chanting in a strange language. He then pulls a dark black tentacle from his robes crushes it in his hand begins to drink the juices and debris. At this point dark black tentacles erupt from the ground encompassing Ludolf, Triäsa  and Pardot. Unfortunately I can not reach Daventry in the cube.

The three of you need to make DC19 Dex Saves or take 4 non-lethal bludgeoning damage and become restrained by the tentacles at the start of your turn.

As the tentacles erupt from the ground the Old Man says, "Easy my pets, it is not their time to die. Yet."

Combat Tracker. Triäsa is up

(DEX Save: 7)

(I'm unclear whether the spell somehow happened before my turn or not, since it wasc after everyone else's.  But whatever.)

Restrained by the tentacles, Triäsa uses her Planar Teleportation to move to a spot directly behind the hut, near Ludolf.  She then casts Cure Wounds (3rd lvl, heals 15 hp).

"We need to get out of here and regroup," Triäsa says. "Perhaps the snakes aren't real?"

Legendary actions are going to be a little tricky in pbp in fairness this one would be after your turn. In the future if I am considering a Legendary action I specify who can and can not act. Since this likely will affect Triäsa's turn feel free to redo your actions so that the Black Tentacles have not been cast when she acts. In the future I will be more careful of the initiative and LA.

I'll wait to hear from you before I post the NPC turns.

(Given the change, Triäsa will simply walk to the spot to heal herself.)

Lifting her voice softly for a brief song, Triäsa then encourages Daventry in her endeavors. (Bardic Inspiration - 1d8 add to any ability check, attack, or save)

(After the song she makes the same comment.)

Triäsa takes a step back next to Ludolf and is just out of reach of the tentacles when they sprout from the ground catching only Pardot and Ludolf. (I had already decided where I was going to place it. I didn't think it would be fair to move to catch all of you with Tri's movement. So I just left it. I know ten feet south would have been better but I got other options)

Malison slithers 30 feet forward and sneers as he finally approaches his prey. He again fires two arrows at Daventry. 

Attack 1: 7 Damage: 9 Piercing + 8 Poison

Attack 1: 12 Damage: 8 Piercing + 4 Poison

At the end of the round you look at the snakes and noticed the two crescents have finally reached each other forming a complete circle around you. You find yourself trapped on a island among a sea of writhing snakes.

The Old Man continues his march forward toward his writhing tentacles. He says nothing.

The Priest moves diagonally 30 feet to the southeast to be just behind the Malison. She forms the familiar sounds and incantations of acid arrow and fires one with a bit more force at Daventry. 

3rd level slot for acid arrow

Attack: 19 Damage: 11 (Half on a miss) on hit take 9 at the start of your turn.

The Warrior moves to the northeast loads it's bow and fires two arrows, one at Ludolf and one at Pardot.

@Ludolf

Attack: 16  Damage: 7 DC15 Con Save 4 on a fail, half on a success

@Pardot

Attack: 24  Damage: 10 DC15 Con Save 9 on a fail, half on a success

All PC's are up. With the change in NPC positions Pardot and Ludolf have full cover from the priest and Malison 1 and half cover from the Old man and Warrior. Triäsa  and Daventry have full cover from the Old Man and Warrior and half cover from Malison and Priest.

Map:

Combat Tracker:

Daventry ducks behind her shield as the two arrows pierce the wood, neither finding their mark, then let's out a sharp scream of pain as the acid burns her.

(Down to 20/52... Ouchie)

She is about to tighten her grip on her blade and charge the priestess, but first looks to see how her companions fared that volley... 

Though he managed to avoid the snakes coiling around his feet, the arrow hit and he wasn't able to withstand the poison ((I'm down at 4 hp...)).

Not sure who to what to focus on, in a desperate attempt to stop something, he focuses a max level guiding bolt and star arrow at the old man.