[Prima listens, expression guarding at the explanation. he's not - disturbed, at least not visibly - but it's clearly not something he's accustomed to.]

A vampiric life form...and Marked, no less. [obviously, or Rung wouldn't have brought it up. he nods, slowly, in agreement.] Ideally, some sort of substitute, but...

...he feeds off their life, or is it something else?