Phandelver and Below: The Shattered Obelisk

Boona grunted as the rock hit her and invited the moon to visit them underground especially the woman yelling at her.

Moonbeam centered on Honna- DC 14 Con Save or 9 Radiant Damage. Half on successful Save.

Karst charged the northern Galeb Duhr.

Attack: 15 Damage: 10

Bryony is horrified by the onslaught of the galeb duhr. True to their form, they seem to shrug off her companions' blows but give back mighty blows in return. To make matters worse, she can hear the snake lady calling out again, which means she's back from wherever Jorzu had sent her. Bryony is torn, biting her lip with consternation. The little halfling feels like they have only two options to get the galeb duhr to stop attacking. They either have to surrender or they have to take down their leader, the snake lady. Bryony really doesn't want to surrender. Even if they did, what was there to stop the snake lady from turning the rest of them into stone? It's what she did to Fergus and Laiti, and neither of them had even done anything to her! No, the snake lady had to pay for what she did.

Bryony ducks underneath the galeb duhr and rushes into the room, launching herself right at Honna, blades pointed straight at the woman's heart. She knows that the snake lady will probably try to turn her into stone again. And this time she might not be so lucky as to shrug it off. But she has to do this. For Fergus. 

Action: Shortsword against Honna - 12 to hit for 9 piercing damage; Dagger (Nick) against Honna - 13 to hit (rolled again for advantage in case the Shortsword attack hit but it was 11) for 5 piercing damage + 14 sneak attack damage if either attack hit (Piercer: Puncture to re-roll a 1 from the Sneak Attack damage)

BA: Cunning Action - Disengage on galeb duhr (Halfling Nimbleness to move through them)

Movement: I believe 25 feet is enough to get her within melee range of Honna if diagonals are only 5 feet.

Jurgen smacks the elemental with his flame-dripping staff. He can sense that the poison is not effective against these creatures, but his fire is. Both Jurgen and Karst manage to inflict damage. But these things are tough.

A silvery beam of pale light shines down upon Honna. She tries to shake off the painful light: DC14 CON Save: 23

Bryony manages to duck under the throng and reappear in the chapel with Honna and her notetaker. However, her blades do not find purchase on the scowling woman.

((Fergus reminded me that I still had a Bardic Inspiration to use. Can I add 1 to my shortsword attack? If it hits, the sneak attack damage applies as well.))

From the smear of black blood staining the back of her gown, Bryony can see that her blade indeed connected where she thought she had failed... Nevertheless, while injured, the medusa is not yet "bloodied".

The rock-things begin to converge. Violently.

Galeb Duhr #1 Slam Attack vs. Bryony: 17. Hit: 7 Bludgeoning damage.
Faceless boulder #1 Slam Attack vs. Bryony: 28. Hit: 12 Bludgeoning damage.
Faceless boulder #4 Slam Attack vs. Bryony: 17. Hit: 12 Bludgeoning damage.
Galeb Duhr #3 Slam Attack vs. Jurgen: 21. Hit: 13 Bludgeoning damage.
Galeb Duhr #2 Slam Attack vs. Boona: 20. Hit: 13 Bludgeoning damage.
Faceless boulder #5 Slam Attack vs. Hero: 26. Hit: 9 Bludgeoning damage.
Faceless boulder #6 Slam Attack vs. Boona: 21. Hit: 10 Bludgeoning damage.

"I said kneel!" commands Honna, her snakes hissing and her eyes glittering with power.

Bryony, Boona, Jurgen, Hero, and Karst: Make a DC13 CON Save against the medusa's petrifying gaze, or become restrained as petrification begins to take hold...

Critical hit damage vs. Bryony as the boulder nearly crushes her: +11 bludgeoning damage. 

Jurgen reaction: Silvery Barbs for Bryony (Please Reroll)

Jurgen CON Save: 22

Hero CON Save: 16

Also, the creature Jurgen last hit had DIS ADV on its attack.

Bryony uses Uncanny Dodge to halve the critical hit for 12 hp and make it 6 instead. Can she halve the critical hit damage as well?

DC 13 Con Save - 18

I'm sorry folks, I meant Bryony

Jorzu 

With a final sweep of his hands Jorzu finishes his ritual. He can feel the magic bestowed upon him by the Fey return. Alone, save for Alaeddix, he races around to the main hallway in hopes of helping those in battle. He beckons for Alaeddix to follow.

Faceless boulder #1 Slam Attack vs. Bryony: 28. Hit: 12 Bludgeoning damage. Critical hit damage vs. Bryony as the boulder nearly crushes her: +6 bludgeoning damage.

Jurgen magically distracts the faceless elemental walloping Bryony. Silvery barbs reroll: 

Faceless boulder #1 Slam Attack vs. Bryony: 28. Hit: 12 Bludgeoning damage.

(Bryony may halve the damage with Uncanny Dodge, including the critical hit damage.)

Boona and Karst: Make that DC13 CON Save or become restrained as petrification begins to set in.

Jorzu, having finished his ritual, races through the Armory and the Sparring Chamber with renewed vigor. Alaeddix huffs and puffs behind him, grumbling the whole way. "Too fast! Too fast!" he wheezes. 

Jorzu is just approaching the open doorway to the hallway when he sees the door, directly across the hall from him, open. Two faces peer out. The lead figure is a dark-complexioned elf with a flash of platinum hair. You catch a glimpse of hard steel armor beneath a well-worn black cloak. Behind him leers an unhealthy-looking human in a robe with slimy, unnatural, insectlike wings. “Need a hand?” asks the dark elf to Jorzu. With a wave of his hand, several of the elementals light up with an unnatural glow. 

Fairie Fire: DC15 Dex Saves or attacks gain advantage: Galeb Duhr #2: 17 #3:6; Faceless Galeb Duhr #5: 11; Faceless Galeb Duhr #6: 19

Everyone but Jorzu may act. 

Boona Con Save- vs Petrification-18

Karst Con Save - vs Petrification-10

Moonbeam Concentration Check- 18

Boon shrugs off the effect even as Karst transforms fully to stone, though as he spends a lot of his time as rock and earth anyway she's not sure he's bothered by it.

She is now very annoyed and shakes her head in frustration.

She vanishes in a shower of fine grit and appears again behind Honna and smashes her twice with her maul.

Attack vs Honna: 13 Damage: 14

Attack vs Honna: 23 Damage: 9

BA- Misty Step.

Boona vanishes from the hallway, reappearing behind Honna to swing at her. (@Damian_May see if you can edit that post to force rolls through!)

Karst is restrained as he begins to turn to stone. (He gets one more save first!)

Everyone else (except Jorzu) may act. 

( Done)

Bryony is gladdened to see Boona appear behind the snake lady and start walloping her. 

"Turn Fergus back or Boona will crush you!" the halfling shouts. "And I won't stop either!"

Demonstrating her renewed resolve, the halfling stabs the snake lady with both of her blades again, although Bryony intends to keep snake lady alive, at least until she reveals how to save Fergus and Laiti. 

Action: Shortsword (Vex) - 26 to hit for 10 piercing damage + Cunning Strike: Trip (If the target is Large or smaller, it must succeed on a DC 15 Dex. saving throw or have the Prone condition), uses one 1d6 of Sneak Attack + 16 sneak attack damage (3d6 and re-rolled a 1 due to Piercer).

Dagger (Nick + advantage from Vexed) - Nat 20 (27) to hit for 9 piercing damage  

Between Boona's surprise ambush and Bryony's flurry of blades, Honna is near death. DC15 DEX Save or go prone: 18

Honna stumbles but does not fall. She is in very bad shape.

In desperation, she lashes out physically at Bryony, clawing at her as her snakes hiss and snap. "To me!" she cries to her elemental guardians. "Take them!"
Claw Melee Attack #1 vs. Bryony: 26. Hit: 11 Slashing damage.
Claw Melee Attack #2 vs. Bryony: 22. Hit: 13 Slashing damage.
Snake Hair Melee Attack vs. Bryony: 22. Hit: 7 Piercing damage plus 10 Poison damage.

The rocky figures obey.
Two of them begin wailing upon Boona:
Galeb Duhr #1 Slam Melee Attack vs. Boona: 26. Hit: 14 Bludgeoning damage. 
Faceless Boulder #1: vs. Boona: 28. Hit: 12 Bludgeoning damage. 
Another one rolls in from the bedroom with a ferocious momentum:
Faceless Boulder #2: vs. Boona: 16. Hit: 18 Bludgeoning damage and Boona becomes Prone upon a hit.
More swarm them:
Galeb Duhr #2 Slam Melee Attack vs. Bryony: 10. Hit: 10 Bludgeoning damage.
Galeb Duhr #3 pulls away to try to restrain Bryony (Jurgan and Karst may have an opportunity attack against it.) Faceless boulder #3 tries to assist it from the other side.  Bryony: make a DC16 Strength or Dexterity saving throw at disadvantage (your choice) or become Grappled.
The rock creatures left in the hallway continue to pound away.
Faceless Boulder #5: vs. Hero: 15. Hit: 11 Bludgeoning damage.
Faceless Boulder #6: vs. Karst: 26. Hit: 11 Bludgeoning damage.

Everyone may act! Two of the rock creatures continue to glow with an unworldly light (Advantage to attack.)

Jurgen and Karst have an opportunity attack (Jurgen's at Advantage) if they choose. Then Karst may make one last DC13 CON Save before turning to stone.