While Liarin hits with a bite and Xanrym with a bolt. Other attacks either deflect off Abramo or fly wide:

Liarin takes 17 Necrotic damage divided by half for the save.

Abramo makes two Con Saves for Concentration, both with a 10DC: 187

The snakes stay flying around Abramo's head.

Xanrym - The woman turns to you, "My name is Cirrili, have you come to save me? Get me out of here please!" You see in her eyes and her voice that she really is no more than a girl, 16 perhaps.

Avery is up, the snakes still bite at you so you'll need to make a DC 13 WIS Save at the start of your turn or take 13 Necrotic damage, half on a success.

Quote from drumdigby >>

This post has potentially manipulated dice roll results.

The snakes stay flying around Abramo's head.

Xanrym - The woman turns to you, "My name is Cirrili, have you come to save me? Get me out of here please!" You see in her eyes and her voice that she really is no more than a girl, 16 perhaps.

Avery is up, the snakes still bite at you so you'll need to make a DC 13 WIS Save at the start of your turn or take 14 Necrotic damage, half on a success.

WIS DC Save: 11

Avery, angered by the injury, attacks: 10; damage 9

The sword scrapes off Abramo's armour, and he laughs. "She walks beside me, she is the darkness within us all!" 

Abramo lashes out at Avery with his mace: Attack: 23 Damage: 4

And as a bonus action casts Spiritual Weapon . A sacrificial dagger appears behind Theldrin and stabs at his back:

Dagger against Theldrin: Attack: 23 Damage: 11 Force

You all are up. Abramo is attacking Avery with his mace, Theldrin with a floating dagger, and snakes are biting at anyone starting their turn next to him.

Liarin continues trying to attack the priest, but not finish him off.

Bite Attack: 19 Damage: 12
Claws Attack: 8 Damage: 11

17 on the Wis save.

Quote from drumdigby >>

Xanrym - The woman turns to you, "My name is Cirrili, have you come to save me? Get me out of here please!" You see in her eyes and her voice that she really is no more than a girl, 16 perhaps.

(Assuming that Liarin-bear didn't already knock out Abramo...) 

Seeing the effect of Abramo's spells, Xanrym decides that it's better to kill the priest and figure out another way to find the naga's layer.  He stays back by Cirrili's cage to stay away from the spirit guardians.  As he loads another bolt in his crossbow, Xanrym replies to Cirrili, speaking loudly so that Abramo can hear him too, "Yes, we will set you free, Cirrili!  Abramo betrayed his vows to Merrika for naught! Misha and Jocelyn are dead.  The cult of Explictica Defilus is finished!"

Movement: None.  Remaining behind the statue near Cirrili's cage.
Action: Attack, Crossbow, Light (80/320): 19, Damage: 7
Free Action: Item interaction: load crossbow.  Talking.

"Ack!" Theldrin exclaims as the spirit dagger stabs him in the back.  Hoping that Abramo won't be able to attack him if he can't see him he moves back out of the doorway and into Room 17 (Disengage action).

If Abramo still stands, Xanrym yells, "Come on, Avery!  One last surge, and you can take down this madman!"

Avery continues the fight: Attack: 23; damage 9

Liarin takes half of 15 Necrotic damage.

Theldrin - You don't need to disengage from a spiritual weapon i don't believe. If you wanted I would let you take your turn again, but i'll warn you that after this round Abramo is looking pretty beat up.

Abramo must make a few con saves here: DC12: 9 DC10: 10 DC10: 10

The Spirit Guardians drop as Abramo loses his concentration. He's looking pretty wrecked now, blood showing through his chainmail, "You will never the defeat the queen of evernight!"

He reaches out with his hand to cast Inflict Wounds at 3rd level on Liarin, while the sacrificial Spiritual Weapon attacks Avery from behind:

Liarin Inflict Wounds Attack: 18 Damage: 17 Necrotic

Avery Spiritual Weapon Attack: 9 Damage: 9 Force

You all are up, Abramo is looking really beat now. But as you can tell he can still pack a punch.

(OOC: If Disengage not needed then Theldrin would attack with Fire Bolt before ducking around the corner)

Attack: 24 Damage: 9

Quote from werelemur >>

Attack: 24 Damage: 9

(OOC: That was Theldrin's action from the previous round, right?  So, it would basically be part of his turn back in post #1173.

@drumdigby - factoring in Theldrin's Fire Bolt last round, is Abramo still on his feet at the end of that round?)

He’s still up but just barely.

Quote from Ben_Evolent >>

Quote from werelemur >>

Attack: 24 Damage: 9

(OOC: That was Theldrin's action from the previous round, right?  So, it would basically be part of his turn back in post #1173.

Yes.

LIarin gets knocked out of bear form and badly injured, then shifts back to savage the priest.

Bite Attack: 19 Damage: 5
Claws Attack: 8 Damage: Unable to parse dice roll.

Sorry I just edited to correct slightly injured to badly injured.  Original attacks were AC 19 for 6 damage and AC 20 for 6 damage.