Phandelver and Below: The Shattered Obelisk

The cultist hit by Bryony and Thialia (nearly bloodied but still quite able-bodied) unfurls its wings and flies to the far end of the chamber, just outside Boona's reach (and evading any opportunity attacks by Bryony or others) and blasts Boona.

The struggling cultist in Boona's arms likewise kicks Boona repeatedly from above, delivering a pain that is far more than just physical:
Cultist #3 (grappled) Unarmed Strike Attack #1: 8. Hit: 10 bludgeoning damage plus 8 psychic damage.
Cultist #3 (grappled) Unarmed Strike Attack #2: 10. Hit: 8 bludgeoning damage plus 9 psychic damage.

The other cultist blasts Boona twice with pitch-black, nightmarish energy:
Nightmare Blast Ranged Weapon Attack #1: 10. Hit: 8 psychic damage, and Boona must succeed on a DC 12 WIS Save or become [/condition]frightened [/condition] until the start of the mutate’s next turn.
Nightmare Blast Ranged Weapon Attack #2: 16. Hit: 5 psychic damage, and Boona must succeed on a DC 12 WIS Save or become  likewise [/condition]frightened [/condition].

The paralyzed cultist tries to shake off its paralysis: DC15 WIS Save: 12 

Jurgen and Quinn may act.

Boonas skin...and skull...are apparently too thick to be bothered by most of the blasting and thrashing though she is momentarily inconvenienced by the last one.

Wisdom Save- 22

And Ontharyx?

Ontharyx DC15 WIS save vs. paralysis: 4 

Jurgen attacks the nearest cultist. 

Attack with Staff and Green Flame Blade: 27 to hit with (9+6+4) 19 points of damage

BA - Hero attacks the same: 19 to hit with 3 damage

Ontharyx thumps heavily to the ground. (Bludgeoning damage: 3)

Jurgen slips in between multiple Nightblades to deliver flaming steel to the paralyzed cultist.

Ontharyx lets out a muffled wheeze as he tries to shake off the effects of Jorzu's spell. DC15 WIS save: 2

Bryony, Boona, Alâedixx, Nightblade, and Jorzu may act next.

Nightblade:

Surging past the paralyzed cultist, Nightblade and his three identical friends move east to lock down the cultist on the far eastern wall.  "Remember, Boona, we need Ontharyx unconscious, not dead," he reminds as he attacks the adjacent cultist with no such restraint.

Moonblade attack #1:  Attack: 25 Damage: 11

Moonblade attack #2:  Attack: 24 Damage: 11

Bryony keeps attacking the same cultist as before. She nods at Nightblade's reminder.

"Grab him before he can escape again!" she says while stabbing one of the cultists with her blades.

Shortsword Attack: Nat 20 for 14 piercing damage (Piercer - Puncture & Piercer - Enhanced Critical) + 11 sneak attack damage

Dagger of Venom Attack: 11 to hit for 8 piercing damage

Jorzu 

Even though he knows it's his spell that is holding the cultists rigid, Jorzu keeps one hand extended in front of him and clenched in a fist. "I don't know how long this will last. Grab Ontharyx while we can!" he grunts through gritted teeth. He does manage to fire off two Force balls at the unstuck cultist.

A - casts Eldritch Blast at cultist #1

Blast Attack 1: 15 Damage: 7

Blast Attack 2: 10 Damage: 13

Continues to concentrate on Hold Person

Boona nodded and moved to pick up Ontaryx, dropping the cultist she held to the ground ( will likely take an AoO from them)....she chuckled and a green glow settled around Bryony.

Grapple Ontaryx - Attack: Dice rolls not yet available for this section. Damage: Dice rolls not yet available for this section.

BA- Shield of Faith on Bryony. +2 AC