Saya looks at the runes. (Is Saya able to read the runes?)

Saya make a perception check.

Saya Perception: 17

Saya hopes that the time she spent on Meletis' temples help her understand the meaning of the runes.

Saya studies the runes and looks back at the man named Bathor.  She also then notices that man has sharp fangs and the runes make more sense to her.  The man Bathor is a vampire.

Bathor answers Areus, "The building is our domain.  We require a tithe of blood from all who seek to enter.  Just a pittance really, enough to fill a cup is all I ask.  I don't even need to drink it directly from you.  You may pour your blood into a cup directly if you so desire.  But that is the tithe I ask for to enter here."

"Blood? A cup of blood you say?" Areus takes one step back as the vampire finishes to anwser. He has heard of stories of such creatures, but he never encountered one, until today.
"Some of people of this group, do not have any more blood in them" The hoplite points to the minotaurs.
Areus turns to Calisto and says to her "You first."

Saya steps next to Areus, and puts her hands on his shoulders, suggesting that they should not go further. "Before we give you what you request." She addresses the vampire. "Please tells us first if one of the fragment of the Elpis mask is located within your domain. That is our only business here."

Saya Insight check on Bathor's answer: 26

Soren frowns "Before any of us give you any of our blood, you must first swear on something we can trust that you mean us no harm or ill will, and that goes for any of your friends as well."
Soren turns and whispers to the group "Drink and eat nothing here, even from our own supplies. I seem to remember that the ingestion of vampire blood is part of how one is Turned."

"Elpis mask? I know nothing of a mask.  But there are layers below this building that we have not explored.  Some sort of creature prowls the lower halls.  It does not come up and we do not go down.  I have not seen it but we hear it.  It leaves us alone and so we leave it alone." Bathor answers.

Saya sees that the man speaks truthfully.

Calisto rolls her eyes at Areus and with a mocking tone she laughs at him. "Are you so proud mighty Akroan that you cannot spill a bit of your own blood for the cause?"

“What if, instead of blood, we offer to remove this creature from the lower levels? Would you grant us entrance into your domain? Once we find what we are looking for, we will leave immediately.” Declares Saya to Bathor.

Areus ignores Calisto's remark and says to Bathor "Most of us are accomplished combatants, even if I do not know what we will be facing, I'm sure that we will be able to defeat this creature."

Saya, make a persuasion check, with advantage

Saya Persuasion: 5

(UGH The worst character to roll for persuasion...)

"The creature is of use to us.  It keeps anything else from coming up from below and is like rear-guard security.  As I said, it leaves us alone, we leave it alone.  We have no need to go further below.  We'll take the blood. Its just one cup." Bathor answers.

Callaphe

"I see." says Areus as the vampire rejects the group's offer. The Akroan turns towards the rest of the group "It seems that we do not have any other choice that give him what he wants."
He takes out from his pack a flask of oil, he removes its contents and then gripping his sword by the blade, he wounds himself and pours into the flask the blood.
As he finishes to filling the flask, Areus bandages his hand and then offers the flask of blood to the vampire. "Here is your blood, let us pass now."

"What about the other ones then," Callaphe says over Areus, eyes locked on them

"Other ones? What are you talking about Callaphe?" asks Areus looking around.

Saya becomes slightly alarmed, and steps in front of Areus. Making sure that the Vampire does get a hold the flask without the party’s permission. She readies her shield and battleaxe. “What do you see Callaphe?”

Soren waves his arm again, and the same wave as before ripples out (Divine sense). 

"Let's see what you're hiding, vampire."

Soren's Divine Sense reveals that Bathor is undead.  Two other undead beings are nearby, hidden in shadows at the back of the room.  

"That is Michael and Wilhelm.  They are with me.  As I said, this is our home." Bathor answers.  "We mean you no direct harm, just a tithe of blood the Akroan here is willing to give."  He licks his lips as he watches Areus spill his blood into an empty flask.  

Areus takes 4 damage

Michael and Wilhelm make no moves towards you as Bathor reaches out and takes the blood from Areus.

"You may pass." He says as he sweeps his arm to the right. 

Calisto laughs from behind you.  "Let's go, I have no more time for this." As she moves to go ahead of you down the hallway directed by Bathor that leads into the Halls of justice.

Saya keeps her guard, and watches the vampires as they pass.