Necromancer's Delusion-Homebrew

(That is exactly what I was hoping, thanks!)

Grunting Initiative: 17

Hearing the scraping of Mucor's armor against the stone wall the orcs stop talking and grab their weapons. As Gabriel runs into the middle of the orcs and leaps over the campfire his body transforms spouting spectral wings.  The Orc's vision tunnels into the sight of a specter emerging from the flames here to collect their souls. 

As Gabriel stands in the fully illuminated room he notices this section of cave has two paths.  One to the north than curves out of sight and the other in the south that leads to another campfire surrounded by goblins.  The orcs cower in fear and are momentarily stunned frightened by this sudden occurrence.

Initiative order:
Group 1: Grunting & Yera
Group 2: Gabriel and Mucor
Group 3: Quentin
Group 4: Onyx
Group 5: Orcs

Updated map:  Cave

Following the half-celestial's advance, Yera charges into the chamber and runs towards the orc northwest of the campfire. If she can reach him with her 25 feet of movement, she'll attack with her shortsword. 

Melee Weapon Attack Attack: 18 Damage: 6

If she can't reach any of them, then she'll use her action to Dodge.

(Each square represents 5 ft.)  

Yera rushes closer to the orcs and readies herself in case she is attacked.

Grunting fires an arrow Attack: 16 Damage: 10 and then goes up (30ft) and pulls out his blades.

Grunting’s arrow Strikes an Orc in the chest. 

Group 2: Mucor and Gabriel !

Gabriel swings his battleaxe in a deadly arc, cutting a swathe in the orcish horde. Attack: 24 Damage: 8 + 4 necrotic damage from Necrotic Shroud.

Grabriel's blow cleaves off an orc's arm.  It staggers for a moment as it turns to flee muttering something in orcish.

(So remind me how being frightened works, do they have to run away from Gabriel or just not towards him? Can Mucor tell which direction they are going to run based on Gabriel's position?)

(They don't have to run, can't get closer and attack at disadvantage)

(Got ya)

Mucor would run into the room, moving in as far as he could and staying close to the south side of the room. Once inside, he would ready spike growth to keep the orcs from attacking the other members of the party by casting it at the enterence to the west side only after Onyx was in the room.

Mucor moves closer to the orc group and prepares to cast once his companions are in the clear.

Updated map: 

 Group 3: Quentin!

The rogue explodes into movement as his companions begin moving forward to engage the Orcs. He bolts down the tunnel in order to ensure that he is both close enough and has an open line of sight so that he can keep his allies covered and keep the pressure on the enemy.

Full 30' of movement, ending in the block near Grunting.

Skidding to a stop on the loose dust and pebbles of the cave floor, Quentin doesn't even wait until he comes to a complete halt before his arm snaps forward and brings his hand crossbow up onto his target. The young rakehell's cerulean gaze locks onto the leftmost Orc in the room and with a smooth, practiced maneuver, he sends a duo of crossbow bolts streaking toward his enemy.

Attack: 11 Damage: 9

Bonus Action; Crossbow Expert Attack: 15 Damage: 9

Quentin's first bolt lodges itself in the orcs shoulder, the second pierces the orc's skull and sends the orc stumbling a few steps back onto the cave floor, dead.

Group 4: Onyx! 

Onyx growls slightly as he's slowest to react, worried that once again he'll be unable to take down an orc before the others finish them off. As he runs into the open space, he catches sight of a few already injured and one trying to flee. The gray dwarf doesn't let that slow his movement as he continues his charge at full speed (50'). Moving right past the first orc that might already be dropping from Quentin's hail of arrows and continuing to the top most uninjured with a spiked shoulder.

Action: Dash 50'

Bonus Armor Spike Attack: 10 Damage: 9

Onyx charges into the orc the spikes deflecting or being absorbed by the armor.  The orc stares down at this new threat and swings his greataxe at you. Attack:  17  Damage:  8  The orc on the far right looks at Gabriel get scared then to Onyx who rammed into his companion and throws a javelin at him.  Attack:  21  Damage:  6 

Gabriel: The orc you attacked turns to run away to the north (attack of opportunity).

 (Mucor can also cast his held spell)

Goblin:   Perception: 3     Initiative:   18

Updated map: (may change pending Mucor and Gabriel's interaction.)

Are we aware of the goblins to the south? Not trying to meta game here :D

I would say everyone but Gabriel is only aware of another path to the south that may contain enemies.  Gabriel is aware that there are goblins but you would wouldn't know exactly what was down that way but could assume that there were more enemies than the four orcs given the briefing from Jesse. With that, it is reasonable to assume you'd block the southern or northern path.

Gabriel swings his battleaxe at the fleeing orc, his eyes dark with rage and righteous fury. Attack: 17 Damage: 11

(Crit!)