It's a fantasy role-playing game.

DM: You are Caleb Widogast, a human wizard . You are the member of the famous group of adventurers. Previously, The bowl is magical. It is used as a communion device.
DM: The bowl is magical. It is used as a communion device. When granted with enough blood and given the proper ritual, it's used to acquire auguries, various bits of divination, and communication across the Divine Gate with whatever this Scaled Tyrant may be.
Player: But it needs a lot of blood?
DM: It needs enough to fill the bowl.
Player: I can tell from my Identify spell that its purpose is to speak with this thing on the other side, this deity?
DM: Some sort of communion, that's all you can make out from it.
Player: What about the vials?
DM: The vials are not magically enchanted.
Player: That sucks. Nothing to be told, okay. I don't want this.
DM: Hold on, Identify should--
