Eithne's shocking grasp gives Troben the opening he needs to cut deeply into an unsuspecting Mourne who garbles as he falls to the ground. "Master..." gasp, wheeze, "I only hope that..." More of the same, "I bought you enough..." More gasping, more wheezing, "time. Remember..." choke, cough, gasp "me..." then the horrible demon dies. With the massive Dredge unprepared, Troben's echo turns and drives his mighty sword into it as well. The Dredge howls with rage as Troben ends the existence of the Demon Mourne and turns and lashes out at Troben's Echo, 'killing' it. It then lumbers after Troben
"Yaauuugghh keeeel maaarrrnn." it yammers as it swings a massive, spiky arm at the knight. In its fury, it smashes Troben solidly in the chest. Though Eithne floats above it, and within its reach, it seems to ignore her, bent on killing the Knight.
As the behemoth turns on Troben, Baldric chases it down from behind, cutting into its thick, leathery hide three times. Both Tiberion and Remy step up and attack it as well, having a similarly damaging effect as the paladin.
Vrod's rage unleashes upon the Wretch, killing it where it stands before it can attack him again. Then the big orc leaps over the corpses and charges at the Dredge.
"Good job, you two!" Austin calls out to Troben and Eithne. The sorcerer, knowing the Dredge might be dangerous, but also knowing that its only a matter of time before his even more dangerous companions take it down, launches a Fire Bolt at it.
Troben suffers 11 damage (max from it) and must make a STR Save against Knockback DC: 13. On fail by 1-3, KB 1 space +1d4 damage. FB 4-7 KB 2 spaces, 2d4 damage, and FB 8+ KB 3 spaces, 3d4 damage.
Troben and Eithne have Advantage against the Dredge because of the position of Baldric and Tiberion.
Terrain: The room is filled with thick viscera, slippery especially considering the softness of the ground. Whenever you move, you must make a DC 10 +1 per five foot space moved DEX Save or slip and fall prone. How much you fail determines in which space you fall.
Sadly, each of your enemies has feet with claws that grip into the terrain, nullifying this effect for them.
Eithne is currently flying and unaffected.
Dredge
AC: 15
Dex Save: -1, Initiative: +2
Special Abilities
A Stone Skin-like effect (resistance vs. all physical damage)
Protect: The Dredge can use its Reaction to protect an adjacent ally by imposing disadvantage on an attack made against that ally as the Protection Fighting Style (its massive chitinous arm is its 'shield'). It may do this twice as if it had two reactions but only once per attacker. So, if Troben attacks Mourne, the first attack is at Disadvantage but the rest are normal. If Baldric then Attacks Mourne, his first attack is also at Disadvantage, but the rest are normal. Any further attacks are 'normal'. This ability may only be used to impose Disadvantage against Melee Attacks. Further, if the attack rolls at disadvantage misses Mourne but would hit the Dredge's AC (even if its only one of the two rolls as if the better roll were not at disadvantage against the dredge), then the Dredge suffers the damage.
ATTACK
Claw/Slam: 2x attacks, +9, 1d6 +5 Slashing + STR Save against Knockback DC: 13. On fail by 1-3, KB 1 space +1d4 damage. FB 4-7 KB 2 spaces, 2d4 damage, and FB 8+ KB 3 spaces, 3d4 damage.
Wretch
AC: 16
Dex Save: +2, Initiative: +3
Slam Attack x2: +8, 2d6+4 bludgeoning damage, Reach 10 feet and has essentially the Polearm Master feat
Plague Fiend
Dex Save: +3, Initiative: +5
Special Abilities
Plague Rot: On any damage taken, roll 1d6. On a 1 or 2, the damage is halved due to chunks of rotten 'meat' falling off of the Plague Fiend where it was hurt.
Attacks
Attack: 2x claws; +13, 4d6+2 slashing damage
Mourne
Dex Save: +0, Initiative: +3
AC: 16
Special Abilities
Allies: Has the ability to make multiple enemies into allies in a 10 foot radius. Enemies get a DC 15 WIS save or believe Mourne to be their Ally, to the point of attacking their own true allies. If Mourne uses this ability on a character a second time, they gain advantage on the save. After that, the ability can no longer affect the target for a week.
Pre-sense: If Mourne makes an Ally of someone, he can sense through their sense while he concentrates on that ally (or former ally if the Allies ability has been broken) for up to 1 hour.
Jump: Mourne has the ability to 'jump' to one of his Mirror Images (if the spell is active), destroying that Image. Mourne can do this as a Reaction.
Multiple Concentration: Mourne has the ability to concentrate on at least 2 (possibly more, we don't know yet) spells/abilities at once.
Attacks
Spell Casting (spells so far; Sanctuary, Mirror Image) Save DC: 18
Summary
Mourne provides a 5d4, +4 ME roll, but with the Arcane Sponge, its reduced to 5d8, +1. Rolls that earn ME (not the free one) can gain from the Expanded Chart, but only 1 maximum.
BTW, all the other creatures in the room have the same ME rolls as the Plague Fiend, which for you guys right now is a 6d10 roll.
Vrod shouldn't have been able to kill the Wretch this round but scored a natty dub on his second roll and rolled good damage for the critical hit ... it was really a very impressive strike that no one else saw because of that hulking Dredge... but Vrod knows he did it and that's enough for him.
You guys are up again.