There’s a cluster of five by the west wall and the two near the curved northwest wall. Both groups are about 50 feet from you, so you could use your movement to get close enough. I’d say you could target either both members of the group of two or three members of the group of five.

(OOC - ok, awesome, thanks!)

Genken shakes his head, "Well, this is not looking great. Let's focus on the large group first!" and he dashes over to the cluster of five (movement and bonus/cunning action = 60ft total) to position himself to get as many in a line as possible. He takes a deep breath before spewing forth a spray of acid 5ft wide in a line 30ft in front. Once done, he wipes the last drops of acid from his mouth, then prepares for the goblins' next attack.

Acid Breath: 3 or half as much on DEX Save DC 10.

(I completely forgot you could dash as a bonus action to get all the way over to the group. That being the case, I'd say you could curve around so you're standing to the south of the group and angle yourself to get all five at once.)

Dex saves: 9 13 10 6 20

Some of the goblins see you coming and are able to dodge most of the effect, but others are not so lucky and get hit with the full force of the acid breath.

Up next is Summer

Summer mumble under her breath and point towards the cluster of five goblins against the west wall. The air slightly changes around them as I cast a sleep spell.

Sleep Dice: 31

All five goblins suddenly slump over, bows and blades clattering to the ground.

Up next is Ondrej and Lar-Dun

Ondrej crashes through the doorway and runs into the room with a roar. Leaving his sword sheathed, he pulls a javelin from the bundle on his back. Hurtling towards the pair of goblins at the curved wall, he heaves the javelin at the one Arisys had targeted.

(Bonus action- rage. I'll use my full movement (30) towards the two goblins that are awake.)

Reckless attack with the javelin: Attack: 21 Damage: 8

The javelin pierces through the goblin’s abdomen, pinning it against the wall. Its body goes limp and its head lolls forwards.

Up next is Lar-Dun

Lar-Dun throws an Eldritch Blast at whoever is closest.

(No dice roller on mobile, so I’m not sure how you want me to do that. Maybe if you wanted to do the rolls?)

(I can do it if you want)

Attack: 6 Damage: 9

The blast of dark energy hits the wall a few inches away from the one standing goblin's head.

You see the goblin step aside, and from the door emerges a hulking figure, then another, then another. Standing before you are three hobgoblins, each wielding a massive blade. One of them, who seems to be the leader if his decorated armor is anything to go by, moves towards where Ondrej stands in the middle of the room. The second heads towards Genken and the sleeping goblins, while the third goes towards the group still standing at the door.

Behind them, you see a smaller, cloaked figure silhouetted in the door frame. They pull a small scroll from their pocket, and moments later, the parchment crumbles to dust on the floor. It’s barely visible among the violet haze of the room, but the hobgoblins now appear to be surrounded with a faint purple glow. They don’t seem to notice and continue moving forward.

(Notes:

The hobgoblins started their turn pretty far away, so they used the dash action and aren’t attacking this round.

For the next minute, all attacks against the hobgoblins have advantage.)

Up next is Arisys

Quote from JumpierPoet >>

Lar-Dun throws an Eldritch Blast at whoever is closest.

(No dice roller on mobile, so I’m not sure how you want me to do that. Maybe if you wanted to do the rolls?)

 (Not sure if it works on every phone but if you turn it to landscape you can get the dice roller. Pain in the butt getting everything to fit on the screen though, at least on mine.)

(yeah if you're using Chrome as your browser to click on Desktop Site in settings.)

Arisys sees the looming hobgoblins emerge from the door, looks to the sleeping goblins in the other corner. 

"This doesn't look good" she says. 

She draws her boomerang, and chucks it at the hobgoblin leader. Unable to parse dice roll. Damage if hit: 5 (Boomerang returns if a miss)

(To hit didn't work....lets try that again. 13)

The boomerang arcs wide, hurtling back to your outstretched hand.

The one remaining goblin looks from its fallen comrades to the party rushing into the room, then bolts towards the northern door. Most of the goblin horde has left, leaving only a few stragglers in the room.

Up next is Genken

Genken moves back as far from the group of sleeping goblins and the charging hobgoblins as possible. He readies his bow as he does, nocking an arrow and then aiming at the closest hobgoblin to the party as he comes to a stop. He takes a breath and holds it a moment, then looses the arrow.

Shortbow Attack: 20 Damage: 4

Sneak attack due to advantage if hit: 1

After he hits, Genken then tries to hide, blending as best he can with the surrounding chaos (Bonus action - hide: Stealth: 12).

The arrow sinks deep into the hobgoblin's shoulder. It lets out a roar of pain but continues its charge. Skirting around the pile of junk that overtakes the south wall, you duck behind a broken armoire.

Perception rolls: 15 12 19

With the room emptying out so quickly and the hobgoblins focused so intently on their attackers, it's difficult to slip away unnoticed.

Up next is Summer

Summer steps back and takes out her short bow to hit a hobgoblin in the distance

Attack: 9 Damage: Unable to parse dice roll.

The arrow gets stuck in the armor of the hobgoblin nearest to you, seeming to have no effect.

Up next is Ondrej and Lar-Dun

Ondrej grins and rushes to meet the hobgoblin leader advancing toward him. He runs headlong toward the enemy, reaching behind his head to grip the hilt of his greatsword as he goes. As he approaches the hobgoblin, he draws the weapon and in the same motion brings the sword down in an overhead chop.

Attack: 14 Damage: 10

Ondrej, your sword meets the leader's with a clang that echoes throughout the chamber. He shoves your blade away from him with a grin, swinging his own back and preparing to strike.

(I just realized that Summer didn't attack with advantage. In the interest of time, I'll make the second roll now: 11. Damage: 6)

(Retconning my previous statement)

Summer's arrow pierces through the hobgoblin's throat and it crashes to the ground mid-stride, eyes glazing over. You think you hear the figure in the doorway chuckle upon seeing the massive goblinoid fall.

Up next is Lar-Dun

How many would I be able to catch with Burning Hands? 15 foot cone