Penumbra causes her magical hand to open one door, and when nothing disastrous happens, she opens the other door. When she opens the second door, you hear groans and the stirring of creatures coming from the southern room! A few moments later, two ashen zombies emerge and look around. When they spot you they come towards you!

 Initiative Order: Salty Joe - Penumbra - Bankur - Rand - Zombies

Salty Joe moves north five feet and winks his eye putting a faerie fire in the doorway behind the pink ash zombie. (Dex Save 13. My intention is not to hit my party members.) 

Before the zombies can move in close Penumbra lets an arrow fly at the first one through the door.

Attack: 17 Damage: 9

(If my ff hits you will be able to roll again to see if you crit and add your sneak attack because you have advantage.)

(DC13 Dex Save: 4 - Attacks against the zombies have Advantage for 10 rounds!)

Bankur charges at the zombies while pulling his shield from his shoulder to the ready position and unsheathing his mace. Engaging the zombie in front of him, he feints low to his right in an attempt to distract the creature. Once the move is complete Bankur whirls himself around and drops his mace on the zombie in a downward slash.

Attack: 14 Damage: 5

(Edit: forgot about the advantage on my roll! Hopefully just doing a normal second roll works...)

Attack: 9 Damage: 6

Round 1: Salty Joe casts faerie fire on the zombies, who suddenly have a reddish glow about them. Penumbra promptly fires an arrow into the first zombie she sees (blue), releasing a puff of ash as the arrow sinks into its chest. Bankur moves in and bashes the same zombie over the head - and notices more creatures in the southern room!

Rand - ?

Zombies

(Rolling sneak attack damage since Salty's spell gave Penumbra advantage.)

3

Rand fires his crossbow at the zombie directly in front of him. Then he lets his crossbow drop to his side on its heavy cord, and draws his sword.

(Attack with Advantage: Attack: 20 Damage: 5)

Rand's crossbow bolt drives the zombie back and pins it to the wall!! Still, the creature waves its arms about in a futile attempt to grab Bankur. However - when the bolt hit the zombie, a puff of ash blows out and causes the cleric to sneeze in quick succession. (Bankur - make a DC10 CON save or gain disadvantage on attack rolls, saving throws, and ability checks for 1 minute.)

The first zombie (blue) out of the room swings its fists at Bankur (Attack: 10 Damage: 6). Two more zombies come out of the room and surround the cleric, each attacking him! But wait - there's more!! Bankur sees at least two more undead creatures trying to get out of the room!!

Green Attack: 6 Damage: 4

Red Attack: 18 Damage: 4

Round 2:  Everyone's up!

Salty fires at the blue Zombie Attack: 14 Damage: 8

Penumbra lets another arrow fly. (Aiming at red.)

Attack: 25 Damage: 13

(Sneak attack since the zombie is within 5ft of Bankur, and Salty's faerie fire.) 5

Hoping to avoid any puffs of ash from the zombies, Rand takes a deep gulp of air, holds his breath, and steps forward using Talon to cut through the red zombie. "Thanks for keeping them busy, Bankur!" 

(Attack w/ad from FF: 16 Damage: 8)

(Am I the only one seeing "Dice rolls not available" on Rhanloi's post? I can't tell if I'm getting hit or not!)

(DC10 con saving throw: 17)

"It is my pleasure friend Rand! I am happy to be able to entertain our house guests!" With a grin Bankur grabs hold of the holy symbol hanging from a cord around his neck and presents it to the zombies. "Now, let us see how our guests enjoy Ilmater's wrath!"  

(Casting: Channel Divinity: Turn Undead. DC13 WIS saving throw for each zombie (each one that can see or hear me) or be turned)

( I cant see either )

(I was hoping that would resolve itself. Apparently not. So here are the three zombie attacks from Round 1:

The first zombie out of the room swings its fists at Bankur (Blue Attack: 16 Damage: 5). Two more zombies come out of the room and surround the cleric, each attacking him! But wait - there's more!! Bankur sees at least two more undead creatures trying to get out of the room!! Green Attack: Attack: 19 Damage: 2. Red Attack: Attack: 23 Damage: 11.)

Round 2: Salty Joe fires at the blue zombie and misses spectacularly, actually tearing a hole through Penumbra's wing with his poorly placed arrow! (1 damage and no flying until you complete a long rest...) Penumbra maintains concentration through the pain and nearly knocks one of the red zombies arms off with her shot (Red disadvantage on attacks =) Bankur maintains his poise after the mass attacks and attempts to turn the undead creatures (DC13 Wis saves: Blue- 8) : Red - 17 : Green - 9 : Purple - 11 : Yellow - 8 : Black - 10) Rand slashes at the red zombie, hoping to send it back to death. (DC13 Con Save: 7 - Undead Fortitude. If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 5 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the zombie drops to 1 hit point instead.)

(Bankur took 5 damage from Round 1 attacks. Results of your actions in Round 2: Penumbra is hit by Salty Joe's critical fail (rolled two 1's!!) Red zombie destroyed. Purple, Yellow and Black are turned and flee into the room (well, except purple, who's still pinned to the wall by Rand's crossbow bolt!! Blue and Green will attack...)

The two zombies left in the hallway continue their attacks! Blue on Bankur: Attack: 9 Damage: 2

Green shambles forward and strikes at Rand: Attack: 8 Damage: 5

Round 3: Your turn =)

As the new zombie comes forward, Rand takes another deep breath as he dodges the creatures strike and brings his sword around in a fluid, arcing motion. 

(Attack w/ad from FF: 22 Damage: 8)

"Salty, I do like this fire trick... I approve greatly."

"That's gonna leave a scar." Penumbra says as she drops her bow and draws her shortswords. Then taking a deep breath and holding it she charges in and attacks. (Attacking green)

Attack: 19 Damage: 4

Attack: 19 Damage: 6

Sneak attack: 4

"I...am really sorry about that." Salty loads another bolt and cautiously fires a shot at the fleeing pink zombie. 

*Thwack!*: 23 Damage: Unable to parse dice roll.