Strife will quickly move around and jump up on to the table before unleashing a fountain of flames from his open jaws. 

(Move to F4, DC 13 dex save or take 17 fire damage, half on success)

Vappa: Nice save, you only take half damage from the poison, so 8 total points of damage.

Strife: The Swarm fails to make the save and is now bloodied!

The Swarm will attempt to bite Lady Susanne this time. They hit,

 and she takes 4 points of damage. DC 10 CON save or take an additional 14 poison damage, 7 on a success.

Initiative order is back at the top!

Con save 9

Lady Susanne barely hanging in there swipes at the snakes again...

First as a bonus action she casts hex on the snake...then strikes

Attack: 17 Damage: 12 she then slumps down with only a bit of spirit left in her at the moment and says..."Tyr please guide me though this ordeal, give me the strength to finish this!"

Bonus Action: Seldor casts Healing Word on Susanne. "We're almost out of this." 

Heals:7

Then he stabs the snakes, hoping to make good on his word.

Attack: 21 Damage: 9

Strife will take a deep breath before once more blasting the swarm of snakes with fire.

13 fire damage or half on save.

Lady Susanne and Seldor: Your combined damage is enough to kill the last swarm!

Nice!

Is there still a horde of skeletons and spiders at the door?

Someone can make a perception check and find out what they perceive.

Perception:6

Seldor: You hear nothing on the other side of the door. You're pretty confident that whatever was out there is either gone or attempting to stay quiet.

"I don't think that anyone is going to come barging in at the moment. Do you all want to rest or do you want to explore some more and see what these orbs go to?"

"I think those orbs unlock the door we came through... one ones with undead and spiders behind it" the kobold would say as he takes off his tricorn hat and scratches the top of his head. "If we could open the door just a little bit... or put a small hole it it to see through... I could check for critters and hit them with spells..." Steife would say with a smile.

I think we need to rest from that last fight

"Sure, we can just take a break." The kobold would say moving towards the door. "I will take first watch and prepare to cook anything that tries to get through this door." Strife will say with a smile, grabbing his orb and sitting on the floor facing the door.

The party takes a long rest, taking turns keeping watch so that all can rest. What would you like to do?

Strife is going to open the door back to the main room.

Strife: You re-enter the main hall and find it silent as a tomb.

"I wonder where the spiders and dead things went" The kobold would whisper looking around as he makes his way towards the locked door.

Perception 22

Not noticing anything out of the ordinary, Strife would make his way to the ornate doors and put the two stones into the slots to try to open the door.