"This simply will not do, little one. Not at all." Yessaris brandishes his gun at Milo. But before pulling the trigger shouts, " In case you haven't caught on, the dwarf has trained himself slay mages. Act accordingly." With that, yessaris dips off a ways northward, accepting a strike from Milo in exchange of hopefully being out 60ft from Xavier and Sparklegem respectively. "Activate Bull Shell Armament." He commands of his gun, transforming it once more for a moment prior to firing the bullet... at Attorney.

Despite knowing the costs, he hisses out some command that seemed to light a fire in the troubled constructs eyes. The deed done, he steps back in to face Milo, dropping his gun to draw his own oversized battleaxe. "Now where were we?" He says whipping it off to the side as both it and the energy barrier spawning shield crackle with visible arcane energy.

Movement: To BP-13,accepting the OoA from Milo. Then back to BR-14 after casting the spell.

Action(Yessaris): Yessaris Casts (4th level)Disruption Round on Attorney, losing the benefits of Aid, effects of slow, and potential other spell.
(If any ongoing spell on him is higher than 4th level, then here's the Int Check(DC 15+): 14.

Bonus Action: Command Attorney to attack Xavier.

Movement(Attorney): To CC-20.

Action(Attorney): Attorney Uses Mechanized Onslaught(Bite) on Xavier.
Attack: 20 Damage: 7 magical piercing. (If at disadvantage for whatever reason: 15.)
If hit, target takes an additional 10 force damage.

(@Lerus: Y.Horse continues to dodge but will move to BW-7, avoiding Milo along the way if possible.)

As the slow spell begins to take hold, Tupoc grits his teeth and focuses on casting off the magic (gaining advantage after spending a Ki point on Diamond Soul).

New Save (DC19): 27

Yessaris moves away from Milo, already expecting to be pricked by the halfling's dagger:

-> Fancy Dagger (opportunity attack) vs. Yessaris: Attack: 27 Damage: 10 magical piercing.

Milo does not disappoint the artificer, who bleeds for the first time in this fight (Yessaris takes 10 magical piercing damage).

From his new position and better angle, the Yuan-Ti shoots a bullet at Attorney with the intention to help it. Some dents that were masked reappear in its armor (i.e. Aid drops), but the construct's movements are back up to speed (i.e. Slow drops). To Yessaris' dismay, Attorney still looks frightened.

While its master re-approaches Milo, Attorney then bounds for Xavier.The bard only notices once it is too late, getting his lower leg crunched (Xavier takes 17 magical piercing and force damage). Y-Horse/Defendant cuts through the room, approaching the western wall and dodging.

-> Attorney's WIS saving throw {DC 19}: 11

Something inside Attorney seems to continue damaging it. The pain is intense, forcing the machine to release its bite on Xavier's leg (Attorney takes 21 psychic damage).

-> Xavier's concentration check {DC 10}: 21

(Baern will go next.)

Baern lets the fury of battle return to his veins and swings his axe twice more at Abe with little care for how wide of an arc his weapon makes:

-> Over-sized Greataxe vs. Abe: Attack: 34 Damage: 39 magical slashing.

-> Over-sized Greataxe vs. Abe: Attack: 17 Damage: 27 magical slashing.

-> Extra damage from Brutal Critical: 20 

The first attack leaves a deep gash on Abe, whose back is still facing the barbarian (Abe takes 59 magical slashing damage). The wild swing that constitutes the second attack misses Abe completely, smashing against the floor instead.

Despite his success, Baern begins to look slightly exhausted.

(Graxx is up next. Recall that G-Horse is under the effects of Slow.)

Graxx abandons his slowed mount and takes off after Xavier as he has been instructed.

He moves with Feline Agility to end up right behind Xavier at  CD,21.

Graxx uses his cat-like speed to gain on Xavier, thrusting his rapier as he approaches. Unfortunately, the blades bounce off Xavier's armored shoulder pierce harmlessly. The quick-shot bolt on the other hand, finds a gap in the bard's armor, delivering a devastating blow (Xavier takes 45 magical piercing damage).

-> Xavier's concentration check {DC 22}: 24

Mumed would be next, but the cleric is stunned and incapacitated. All he can do is falteringly repeat his most recent sentence: "time... to... shine..."

G-Horse's WIS saving throw {DC 19}: 9

(Nox is next up.)

Nox move backwards to CE-12 and drop the wall of force while she whisk Baerns away.

Nox moves in to protect Abe. As the ooze-wizard begins to Banish Baern, Xavier tries to interrupt it by upcasting Counterspell.

Nox once more counters the Counterspell (reference).

-> Baern's WIS saving throw {DC 19}: 12

The dwarf is banished somewhere.

(Sparklegem is next.)

Sparklegem call forth his [/spell]Illusory Dragon[/spell], who appears about 60 feet in the air. All but Selrach seem to flinch for a moment:

-> WIS saving throw {DC 19}:

• Yessaris: 18
• Attorney: 15
• Abe: 18
• Graxx: 8
• Nox: 24
• Tupoc: 14
• Y-Horse/Defendant and G-Horse: 19, 7
• Graxx and Tupoc also benefit from Bless: 2, 4
• Also, Tupoc auto-succeeds, so please ignore rolls above.

For a moment, Attorney feels the previous source of his fear being lifted from his shoulder. It doesn't last long, as the construct and the two remaining horses (Y-Horse/Defendant and G-Horse) become frightened again.

The Dragon aims its acid breath straight down,  catching a few enemies in its spray.

-> INT saving throw {DC 19}:

• Abe: 9
• Nox: 19
• Attorney: 11 

A blob of acid lands right on top of Yessaris' construct (Attorney takes 28 acid damage and is DEFEATED). At the edge of the blast area, both Abe and Nox manage to avoid most of the splash (Abe and Nox each take 14 acid damage). 

Sparklegem then moves to {BY21} while his Dragon flies upward and away, disappearing into the through the southern wall.

-> Nox's concentration check {DC 10}: 27

(Selrahc is up next. Recall that he is under the effects of Slow. If attacking Mumed, recall you'd first need a WIS saving throw to bypass Sanctuary.)

Nox reaction

counterspell Xavier counterspell at the same level.

Selrahc will slowly attack Mumed with his attack. 

Sanctuary Save: 18

((Nat20 again))

His attack will be GWM (with Bless: [roll]1d4]/roll]). (Since he is stunned I get auto advantage right? Or would that cancel since I am Slowed? If I still have advantage then I won't use a reckless attack.)

Attack: 17 Damage: 25

End of Turn save to break Slow: 6 + Bless 2

((I tried to fix that incorrect tag with the GWM Bless roll but it said I manipulated dice rolls so I edited back to what it was to fix it saying that. Here is the roll: 1))

(@Superbad: Final attack roll is a 22. No need to use Reckless Attack to get advantage this round.)

Selrahc moves one of his arms in a downward direction trying to put an end to Mumed. He is surprised by how slow his movement seems to follow the commands of his brain. Focusing on ending whatever enchantment this is, the barbarian foregoes the attack for now (flavor on the miss). He grabs his head and, with a scream, regains full control of his muscles.

-> Selrahc is no longer affected by Slow.

(Milo will go next.)

"That won't do." Milo says while staring at Yessaris. He sidesteps around his foe {BR13}, dagger in hand, ready to strike. Yessaris prepares to react, but... it's a feign. With his free hand, Milo unleashes the power of one of his rings. A Chaos Bolt flies towards Nox, who feels the energy entering her blindsight field a bit too late.

-> Chaos Bolt vs. Nox: Attack: 25 Damage: 14 lightning damage.

The magic ray changes colors from bright orange to whitish blue before hitting the ooze warrior (Nox takes 14 lightning damage).

 -> Nox's concentration check {DC 10}: 26

Milo then disengages and runs toward {BX9}.

(Abe is next up.)

After the dwarf disappears, Abe moves to CB-15, giving a small wave of thanks to Nox on the way. Once there, he focuses and channels the light of his god, expelling a wave of healing that washes over himself, healing himself for 78 hit points. 

Action: Heal

Reaction: Insight vs Xavier(DC 19): 23.

Yessaris eyes narrow after Milo, having only caught the tail end of his movement too late. Jerking his attention back to Xavier, he gives the musician a studious look...

(@Lerus: I assume non-visible targets are viable targets. But if they are/were, then the target is Bearn for this.)

Reaction (Tupoc): Insight check against Sparklegem (DC19): 24

After the large dragon again appears in space, Tupoc takes a second to make sure his surrounding are secure before studying its creator more closely.

(@All: The DC for the insight checks is 18, not 19.)

Tupoc takes a quick second to study Sparklegem, confirming his suspicions regarding the gnome's magical abilities:

Mechanically speaking, you learn the following about Sparklegem. As assumed before, Tupoc shares all of this with the party. You should all feel free to use this information strategically (a limited metagaming license, if you will). It is OK to assume your characters fully understand the character features implied by the information below (e.g. Malleable Illusions, Spell Mastery, Signature Spells, Gnome Cunning, etc.):

Name: Eldon "Sparklegem" Scheppen;
Race: Rock Gnome;
Class: Wizard - School of Illusion;
Level: 20;
Successful insight checks against Sparklegem: 1 (more info available with further successes; anyone may try as a reaction).

Yessaris takes a similar analytical look at Xavier, wondering how he's still standing...

Limited Metagaming License:

Name: Xavier Nainodel;
Background: Entertainer;
Feats: Lucky, Moderately Armored, War Caster, Resilient (Constitution), Elven Accuracy;
Successful insight checks against Xavier: 2 (more info available with further successes; anyone may try as a reaction).

(I'll resolve Abe's turn next.)

No longer having a dwarf breathing down his neck, Abe moves toward his companions {CB15} and begins to cast Heal. Sparklegem giggles in the background while raising a shiny gem into the air, upcasting Counterspell and preventing the aasimar from recovering.

From his hidden spot, Ingus changes target:

-> Pistol vs. Abe: Attack: 13 Damage: 28 piercing.

-> Pistol vs. Abe: Attack: 13 Damage: 26 piercing.

One of the bullets hits, exploding in a agglomerate of vines and leafs (Abe takes 30 piercing damage).

-> Abe's STR saving throw {DC 20}: 6 - Abe becomes restrained

END OF INITIATIVE ROUND 3

INITIATIVE ROUND 4

• Tupoc - concentrating and benefiting from Bless (counter: 6), as well as Empty Body (counter: 6);
• Xavier - concentrating on Slow (counter: 9), affected by Panache (counter: 8);
• Yessaris & Attorney & Y-Horse/Defendant - benefiting from Aid (4th level), and See Invisibility; Attorney is DEFEATED; Y-Horse has dodged but is frightened;
• Baern - benefiting from Rage and a SPELL; but currently Banished (counter: 9) and has 1 point of exhaustion;
• Graxx & G-Horse - benefiting from Longstrider and Bless (counter: 6), G-Horse is affected by Slow (counter: 9) and is frightened;
• Mumed - benefiting from Sanctuary (counter: 6) but currently stunned and incapacitated;
• Nox - concentrating on Banishment (counter: 9), benefiting from Aid (4th level), Longstrider, and Mage Armor;
• Sparklegem - concentrating on Illusory Dragon (counter: 9) and benefiting from Mirror Image (counter: 6);
• Selrahc - benefiting from Boots of Speed, Longstrider, Bless (counter: 6), and Rage;
• Milo - 
• Abe - benefiting from Death Ward but restrained by Ensnaring Strike (counter: 9);
• Ingus - unseen, concentrating on Ensnaring Strike (counter: 9);

NOTES: You now know more about your opponents so most of their preparations will show in the tracker above (check OOC chat). Some other enemies' preparations will remain unknown until you learn more about them. Yet some other won't even have a generic tab in the tracker above.

MAP for THE SECOND ATTEMPT:

(Tupoc is up next.)

Tupoc squeezes his body around the Stunned cleric and begins to lift him into the air, striking again with Ki infused fists as he does. With a focused burst of speed (Step of the Wind), he takes Mumed up 80 feet and drops him back to the ground. After doing so, he begins to return to the ground, making it back to 70 feet above the ground.

Attack: 14 Damage: 8, on hit target makes DC19 Con saving throw or become stunned for another turn

Attack: 30 Damage: 6, on hit target makes DC19 Con saving throw or become stunned for another turn

Fall Damage (autofails Dex Saving throw/ acrobatics check): 23

Edit: Forgotten wisdom saving throws for Sanctuary:

Save 1: 24

Save 2: 25