Seeing his companions start to falter around him, Titus calls upon his divine righteousness to guide them through this trial. He calls upon his holy power to turn the tide and rally the party to defeat this fiendish foe that he had so foolishly underestimated. "Come now ye righteous few! We are not done here yet! Let us bring justice down upon the wicked!" 

Titus will use his Channel Divinity: Turn the Tide as a bonus action. This will allow Titus, Morph, and Saralyssa to each gain 1d6+3 hp: 8

Titus will then unload on the spider engaged with him. He lunges forward and hacks away with his battleax. 

Battleaxe Attack 1: 8 Damage: 11

Battleaxe Attack 2: 25 Damage: 12

If he is able to fell the create he will charge into the fray towards spider #6, trying to position himself right in between Morph and Saralyssa so he can protect them with his shield. "Stay close!" he barks as he starts to square up with the spider and the Elite drow. His allies can feel a warm glow around them as the Paladin's aura washes over them. 

Spider 7 falls and hacks off the leg of Spider 6 but it doesn't yet fall.

Rethan, Morph, and Saralyssa are up!

With Saralyssa falling to the elite warrior's blade, the storm fades away.

Rising to her feet, after the healing given her, she growls as she lifts her hand again. A mote of fire sizzles from her fingertip then leaps away as a flaming mote, exploding into a fireball... (she casts it at 4th level)
DC 14 dex save for half or take 45 fire damage.

DEX(14) checks:

 The spider and the quaggoth are consumed by the blaze while the drow elite dives to the side, receiving significant burns but not enough to kill him.

Rethan and Morph are up. Only the elite drow is left an he looks to be on his last legs.

Morph sits bolt upright, taking in a gasp of air, as the healing magic from Titus restores his body.

Seeing the drow still standing, but everything else dead and burned, Morph raises his rod, as he stands back to his feet and utters a arcane word and makes a gesture.

As the twin beams shoot out of the rod, Morph's eyes pulse faintly with golden light that spreads to his while body before fading, leaving him even more healed.

The elite drow has a moment of panic flash across his eyes before the bolts of energy smash him to the ground. He does not rise ever again.

Combat has ended!

If the drow is still standing, Rethan moves over and lashes out with his staff.

Attack: 28 Damage: 7

Extra Attack: 22 Damage: 13

Bonus Attack: 21 Damage: 10

"Well that was a nasty bit of work, everyone ok?"

Morph stretches out, groaning with the aches caused by his injury.

"Should we take a break, try to bandage our wound?"

Morph pats his Medics Manual.

"I have a new ritual spell I can try if we want some guaranteed safety while we rest."

Morph opens the book and flicks through the pages.

"Its called...Leomund’s Tiny Hut. It creates a dome of force that can protect us while we rest."

"It even last long enough to sleep the night, if and when we want to do that."

"I think a rest would be appropriate." Saralyssa says as she checks out her own wounds. Some were still leaking a bit of blood, but most were covered by healed skin, thanks to the healing she had recieved, but even those looked angry and red, clearly not fully healed as of yet. "I vote that, next time we see a lone drow using a bathroom, we just take him out, before he can go and gather his friends..."

“I’ve never been in favor of slaying my foes while they were on the toilet... it’s not exactly an honorable matchup, but I do concede that this would have been the wiser course of action. So, are we opening another door or have we officially had our fill of surprises today?”

As the party gathers themselves following the fierce fight, Titus will examine the body of the Elite Drow to see if he had anything that would indicate why they were here.

Morph nods his agreement,

"Yeah, I think, at the least, immediately restraining any lone drow we come upon, may be the prudent course of action from now on."

At Titus' question about trying another door, Morph comments.

"I think we take at least a short break and then see how everyone feels before we decide if we are going to try more doors, or try to make for the stairs down, or just call it a day."

As Titus starts checking the Elite Drow's body, Morph starts doing the same with other bodies, looking for and collecting any valuables or items of interest.

Okay, everyone takes a long rest.

DM shield:

-a`and Morph, looking through the carnage, manage to find the following:

• 3010 gp in assorted denominations
• A Bead of Force
• A Potion of Frost Giant Strength
• A gold locket with the portrait of a non-drow elf inside (valued at 25 gp)
• 2 Cloth-of-gold vestments (valued at 25 gp each)
• A copper chalice with silver filigree (valued at 25 gp)
• A pair of engraved bone dice (valued at 25 gp)
• A matching pair of carved bone statues (valued at 25 gp each)

After finishing collecting valuables from the dead with Titus, Morph moves the bodies of the dead away from the corner furthest from the door and then sits down to cast Leomund’s Tiny Hut.

11 minutes later a hemisphere of force springs to life around the party, shielding them from the outside world.

Morning arrives and the party find a group of 7 drow, 3 giant spiders, and a quaggoth all waiting outside the tiny hut for their opportunity to strike the first to leave it. One of the drow, a woman, is dressed in fine, elaborate priestess robes. Another is dressed in the robes of a mage. The other five are wielding weapons similar to their brethren laying dead about the room.

Saralyssa starts to perform a second tiny hut spell as a ritual, working to time it as their current one goes down. "Should give us a safe place to attack from, once it is up." She explains. (mundane attacks can pass out of the hut, just not magical ones, while no attacks, magical or non-magical, can pass inside of it.) She will stop if the group wishes to do this differently.

Morph nods his agreement with Saralyssa's actions, whispering,

"Yes good idea, that will give us room to come up with a plan."

Morph indicates the spot on the ground where he cast the first version.

"That should be the centre of the dome."

Morph assesses the parties opponents, before looking at his friends.

"So any idea's how to best tackle the problem? Maybe we take stock of our abilities and equipment and come up with a plan?"

"I could try and banishing one of the drow that looks like a caster, that would give us a minute to deal with the others."

"I also have this, I haven't tried it yet."

Morph pulls out a small bottle. A tiny amount of smoke leaks from the stopper.

"This is supposed to create a fairly large smoke cloud when opened. We could try and escape through it maybe. Without being able to see, fighting in the cloud may not be helpful though."

"I have this as well."

Morph pulls out a flask.

"This has an endless source of water. I can make it blast out in a geyser, might knock someone over, certainly would annoy them, get them wet..."

"I also have the bag that summons animals, but I never know what will appear, plus if its large it would collapse the dome, so I would have to throw the fluff outside, to summon them."

Morph looks at his friends, hoping they will bring other options to the table and the group can work out a plan.

"I'm all about just blasting them." Saraalyssa says as she works her ritual spell. "Other than that I will listen to what you guys wish to try first."

Titus states at one of the Drow through the shimmering magical barrier. 

“Look at these sad sacks. Spent their whole night just waiting here with the bits of their buddies just for us to wake up.” He turns to the priestess, “What makes you think you’ll fare any better than the last batch?”