Vulcan, not the nimblest person alive, still rushes to dodge what he can.

Acrobatics: 23

He then scans the town and attempts to analyze the best points and directions to escape from.

Investigation: 25

Knowledge(Arcane): 21

EXELDA: SUCCESS, SUCCESS, SUCCESS.
TORA: SUCCESS, FAIL, SUCCESS. 
MADISON: SUCCESS, FAIL, SUCCESS. 
DIA: SUCCESS, FAIL, SUCCESS. DIA NOOOO! The shadowlings attack, and you take 7 damage!
VULCAN: FAIL, FAIL, FAIL. Falling in acid and being attack by the minions of an elder god are no fun. You take 24 damage and 14 you lose a permanent point of Charisma.

Father certainly wasn’t the most dexterous person alive, but he would give it best anyways!

Acro: 6 + 3

As for avoiding shadows, he keeps his eyes peeled and dodges accordingly (hopefully).

Perception: 13 + 3

He hopes that his mental prayers to Umbra and good enough to keep him mentally rooted to the hellish landscape.

Religion:  22 + 1

EXELDA: SUCCESS, SUCCESS, SUCCESS.
TORA: SUCCESS, FAIL, SUCCESS. 
MADISON: SUCCESS, FAIL, SUCCESS. 
DIA: SUCCESS, FAIL, SUCCESS. 
VULCAN: FAIL, FAIL, FAIL.
FATHER: FAIL, FAIL, FAIL. You bail hard, the shadowlings find you, and this all is way too much than you can bear. You take 22 damage, and 5 a persistent dark shadow lingers in your peripheral vision now, constantly. You have disadvantage on perception checks. Forever.

Acrobatics: 19

Athletics: 16

Arcana: 4

Her newfound powers give Freya the confidence to easily and casually walk out of town, seeking safety along with everyone else. “There’s no need to be scared, you sheep.  These visitors are our friends!”

Acrobatics: 13

Then, using her existing skills of melting into crowds, she pulls her cloak up over her head and hides behind the throngs of citizens fleeing.

Stealth: 20

Finally, she looks inward, and seeks the wisdom of the new Sanguine Cursed blood flowing within, hearing its ancient calls, soothing her fears away.

Arcana: 10

EXELDA: SUCCESS, SUCCESS, SUCCESS.
TORA: SUCCESS, FAIL, SUCCESS. 
MADISON: SUCCESS, FAIL, SUCCESS. 
DIA: SUCCESS, FAIL, SUCCESS. 
VULCAN: FAIL, FAIL, FAIL.
FATHER: FAIL, FAIL, FAIL.
VILLANELLE: PASS, FAIL, FAIL. The shadowlings intercept you, attacking you viciously for 14. The event leaves your mind shattered further, 1. Your head splits with thunderous noise, and you take additional 9 psychic damage.
FREYA: FAIL, PASS, FAIL. It burns us, the acid. Learning your newfound abilities, you bail, taking 10 acid damage. On top of it, the voices speak to you in a language you don't understand. 8 A treasured item begins to speak in a voice from your childhood. It implores you to harm yourself. (This will have RP effects in the next parts of the adventure)

DRIFTCHAPEL CLIMAX
EPISODE SIX: "THE CULT OF QATU"

The gibbering madmen of the Cult of Qatu have never been closer to achieving their profane goal, scrawling a runic circle with a mixture of human and Deep One blood outside of town where you have fled to. Their ancient master, Qatu, slumbers in her tomb beneath the waves - but now, the tide has risen, and the time has come to unleash her unreckonable destruction upon the world. Qatu Cultists willingly kill and die for their master, and will stop at nothing to complete their ritual. 

CHALLENGE ONE - THE RUNIC CIRCLE: A circle of blood and seaweed dominates the area, ringed with weeping, black candles and surrounded by five robed cultists. The circle occasionally activates, glowing a dark crimson and expelling a wave of crippling psychic energy. As you stand near it, a DC15 WIS save must be made or suffer psychic damage as you fend off the horrors of another reality. The psychic energy stops once all five cultists have been killed. Those who attack the cultists will be in range of this horrible energy.

CHALLENGE TWO - THE AVATAR OF QATU: As the battle commences, a cultist leader speaks aloud a profane phrase and bleeds itself with a curved dagger. A moment later, it transforms, body twisting, warping, and ripping in two to reveal a new, horrific form. The Avatar of Qatu has risen, a massive tentacled sea behemoth with little of it's human form intact. As everyone witnesses this Lovecraftian transformation, your mind rips apart and takes damage unless you make a DC15 CON save. This happens once. Then, it attacks.

CHALLENGE THREE - THE FIVE FULCRUMS: The five cultists standing around the runic circle appear to be concentrating, attempting to complete the awakening ritual. As this happens, horrors from beyond emerge and attack anything in sight. Someone must push back the waves of Nightmare.

OPTIONS YOU CAN DO ON YOUR TURN: Attack the cultists in Challenge One, attack the Avatar of Qatu in Challenge Two, attack the waves of Nightmare in Challenge Three. Heal yourself or one person, Cast a spell. 

Villanelle will heal herself with Lay on Hands this turn.

Freya will cast Protection from Evil and Good on herself. 

Risking further madness, LeBlanc would step forth from the shadows to address the circle of cultists.

Wis save: 3 + 3 + 3 (Villanelle's aura)

El will pick some shattered glass off the street. "Poignards du pluie." She'll whip it like a skipping stone to the centre of the cultists, bursting into a cloud of daggers.

Damage: 21

For this turn, Father will cast Cure Wounds (third level) on himself to get him back up 16 hp!

Humming softly, Dia makes an arcane symbol, and fire erupts under the feet of one of the cultists.

DC 15 Dex ST or 6 fire damage.

VILLANELLE: Healing spell.
FATHER: Healing spell.
FREYA: Protection spell.
EXELDA: You fail the WIS save. You take 5 psychic damage. One of the cultists drop, screaming.
MADISON: Ranged attack, another cultist down. Failed WIS save.

Madison aims her pistols and fires, risking psychic damage as well. WIS save: 19
Pistol Attack: 11 Damage: 21
Pistol Attack: 22 Damage: 19
Sneak Damage if one hits: 13
Psychic damage taken: 4

Another cultist drops.

DIA'S attack save: 12

THE RUNIC CIRCLE: ACTIVE
THE AVATAR OF QATU: ALIVE
FULCRUMS: THREE

Tora moves towards the circle to smackity smack some cultists. 

Wisdom: 23

Staff Attack: 8 Damage: 5

Ponch (same target if not downed. New target if downed.) Attack: 26 Damage: 12

VILLANELLE: Healing spell.
FATHER: Healing spell.
FREYA: Protection spell.
EXELDA: Ranged attack.
MADISON: Ranged attack.
TORA: Ponched. Another cultist down.
VULCAN: ?!?
DIA: Offensive Spell.

THE RUNIC CIRCLE: ACTIVE
THE AVATAR OF QATU: ALIVE
FULCRUMS: TWO

Vulcan braces himself as he prepares to face the Avatar.

Con save: 24

1. VILLANELLE: Healing spell.
2. FATHER: Healing spell.
3. FREYA: Protection spell.
4. EXELDA: Ranged attack.
5. MADISON: Ranged attack.
6. TORA: Ponched. Another cultist down.
7. VULCAN: Braced himself.
8. DIA: Offensive Spell.

THE RUNIC CIRCLE: ACTIVE
THE AVATAR OF QATU: ALIVE
FULCRUMS: TWO

With two Fulcrums still up, waves of shadowlings assault the group. 3, 2, 4, 6

Death attack on Exelda: Attack: 9 Damage: 7
Entropy attack on Dia: Attack: 19 Damage: 8
Insanity attack on Villanelle: Attack: 8 Damage: 9
Eldritch attack on Father: Attack: 6 Damage: 12

A bulbous mass of wet, writhing tentacles fills your entire field of vision. You are unable to wholly comprehend what you're seeing, or how large it truly is. The clicking, hissing, crustacea-esque limbs bursting from its mass lurch toward you all. It's rage is out of control, and it attacks with no regard for itself or allies. 8, 6, 6

Grapple attack on Madison: Attack: 19 Damage: 19
Grapple attack on Tora: Attack: 12 Damage: 16
Grapple attack on Vulcan: Attack: 12 Damage: 13

1. VILLANELLE: 
2. FATHER:
3. FREYA: 
4. EXELDA: 
5. MADISON: 
6. TORA: 
7. VULCAN: 
8. DIA: 

THE RUNIC CIRCLE: ACTIVE
THE AVATAR OF QATU: ALIVE
FULCRUMS: TWO

Villanelle is going to make two attacks at the avatar

Attack: 20 Damage: 6

Attack: 26 Damage: 11

That second one hopefully hit, so here's a 2nd level Smite: 15