zertel makes perception check (20) to see if anything is out of place in the room... note passive perception is 25... 

Quote from Yalexis_09 >>

ooc - I'm down to try and fight them, since the ones that look like vampires don't ping as undead. I think they just might be doppelgangers or something disguised as vampires. Maybe even an illusion. So just in case, Arden is gonna use his Tremorsense to check if there are any enemies who are currently invisible and touching the stone surface in the area.

Stonecunning. As a Bonus Action, you gain Tremorsense with a range of 60 feet for 10 minutes. You must be on a stone surface or touching a stone surface to use this Tremorsense. The stone can be natural or worked. You can use this Bonus Action a number of times equal to your Proficiency Bonus, and you regain all expended uses when you finish a Long Rest.

Tremorsense. A monster with tremorsense can detect and pinpoint the origin of vibrations within a specific radius, provided that the monster and the source of the vibrations are in contact with the same ground or substance.

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Arden’s smile faded as the bandit captain made their demand—one thousand gold just to pass through? That was extortion. His jaw tensed, but what truly caught his attention were the two pale, gaunt figures that bore the look of vampires. And yet… his divine sense had registered no undead presence. Something wasn't right here.

He leaned subtly toward Capa, brow furrowed, and muttered under his breath:

“Aye, those pale ones? They ain’t true vampires. Just dressed the part, I reckon. Our gold’s better spent helpin’ the folk, not lining the pockets of sewer scum. Let me check somethin' before we get to scrappin'.”

Arden placed a firm hand on the stone archway. Drawing on the innate instincts of his dwarven heritage, feeling for any subtle shifts or unnatural disturbances. He tried to sense what the eye could not.

 Arden doesn't detect anything else with his boosted senses.  What you see is all that is in this room.

Quote from CalaQuendi_Silverwand >>

zertel makes perception check (20) to see if anything is out of place in the room... note passive perception is 25... 

 Zertell notices the broken staff at the base of one of the pillars in the room.  You also realized the vampires are a disguise but you don't know what's using the disguise. Yet.

OOC - We will use group init again.  I think it works out better.

15 Player Init

14 Monster Init

Player's have init:

Updated map

The three gray discs are the three columns in the room.  Floor to ceiling for the columns.

do any seem to be obvious spell casters?