Daewen immediately drops into a low, stable crouch, her motions silent as she assesses the sudden threat.  She ignores her rapier, instead drawing her hand crossbow, recognizing that closing the distance through the churning ooze is too dangerous.  She fixes her gaze on the enemy, her body coiled and ready to strike from range as soon as the initiative order permits.

Daewen's initiative: 9

Mun swaps her initiative with Daewin (24 <—> 9). 

(OOC: In parallel with Yistral's move) The massive, repulsive form of the Adult Oblex draws Daewen's focus immediately.  With silent efficiency, she brings her hand crossbow to bear, sighting down the tiny limbs.  She finds a weak point in the green, globular mass and lets the tension of the string fly, firing a quarrel aimed straight at the mass of stolen faces.

• Hand Crossbow Attack #1: 25 Damage: 7
• Hand Crossbow Attack #2: 15 Damage: 8

[I'll wait to see the result of Yistral's turn to add the effects of Daewen's turn onto the Adult Oblex! Yistral is up!]

Initiative (Difficult Terrain In Place)
Yistral: 27 <- Current Turn
Daewen: 24
Oblex Spawn 1: 19
Oblex Spawn 2: 17
Xarkris: 14
Adult Oblex: 12
Mun: 9
Oblex Spawn 3: 6
Eggo: 5

Attacks A with firebolt (20 to hit ) and 14 damage. 

Yistral sends a bolt of fire towards the main oblex, which pierces straight through it and leaves the oozes inside to writhe and scream in pain as they're boiled from the heat. Daewen then shortly follows up with a pair of crossbow bolts that sink deep into the goo of the monster. 

Two of the smaller oozes then swim through the sludge towards the party, the first of the slimes attempting to wrap itself tightly Eggo's shin and drain her memories. 

Oblex Spawn 1: Moves 20 feet, Attacks Eggo with Pseudopod: 24 to hit, 4 bludgeoning damage plus 4 psychic damage on a hit.
Oblex Spawn 2: Dash Action, moves 40 feet. 

Xarkris is up!

Initiative (Difficult Terrain In Place)
Yistral: 27 
Daewen: 24
Oblex Spawn 1: 19
Oblex Spawn 2: 17
Xarkris: 14 <- Current Turn
Adult Oblex: 12 (-29 HP, Aversion to Fire activated (has disadvantage on attack rolls and ability checks until the end of its next turn))
Mun: 9
Oblex Spawn 3: 6
Eggo: 5

Eggo grunts as the oblex strikes her and snarls. (You'll pay for that.) she telepaths to it, if it even knows a language.

[[ Self-notes"
1. took the 8 damage off so don't double-damage yourself later
2. use create bonfire ]]

Xarkris trudges thru the thick slime and rushes to the front to assist Eggo Lass. While moving, he is doing 2 things….eyeing each of the threats and activating the fire in his throat. 
Xarkris will move diagonally to his left 5’ and move south 10’. (I think he had enough movement to accomplish this task). This should put him shoulder-to-shoulder with Eggo Lass, to her left. 
The mighty Dragonborn opens his maw and sends a cone of flame at #2 and will also attempt to catch #1 in the blast. 
Each of the spawns take 7 points of fire damage unless they make a DEX SAVE DC 12 (3 points of fire damage if successful).

END TURN

Xarkris moves up next to Eggo Lass and attempts to engulf the oblexes in flames. 

Oblex Spawn 1 Dex Save: 20
Oblex Spawn 2 Dex Save:  5

The adult oblex then rushes through the sludge to face Xarkris, and attempts to wrap a gooey tendril around both him and Eggo, before trying to steal Xarkris' memories to take as its own. 

Adult Oblex: Moves 5 feet north-west, 15 feet north. Action: Multiattack:
- Psuedopod against Xarkris: 21 to hit, 15 bludgeoning damage plus 9 psychic damage on a hit.
- Psuedopod against Eggo: 9 to hit, 12 bludgeoning damage plus 3 psychic damage on a hit.
- Eat Memories: Xarkris  must succeed on a DC 15 Wisdom saving throw or take 18 (4d8) psychic damage and become memory drained until it finishes a short or long rest or until it benefits from the greater restoration or heal spell. While memory drained, Xarkris must roll a d4 and subtract the number rolled from his ability checks and attack rolls.

The closest oblex is lucky enough to dip down into the cover of the sludge to avoid most of the heat, but the second spawn isn't. (Rolling for if Xarkris fails the save against Eat Memories since I forgot to change the default roll from the monster description: 26)

Mun is up! 

Initiative (Difficult Terrain In Place)
Yistral: 27 
Daewen: 24
Oblex Spawn 1: 19 (-3 HP, Aversion to Fire activated (has disadvantage on attack rolls and ability checks until the end of its next turn))
Oblex Spawn 2: 17 (-7 HP, Aversion to Fire activated (has disadvantage on attack rolls and ability checks until the end of its next turn))
Xarkris: 14
Adult Oblex: 12 (-29 HP, Aversion to Fire activated (has disadvantage on attack rolls and ability checks until the end of its next turn))
Mun: 9 <- Current Turn
Oblex Spawn 3: 6
Eggo: 5