Kalokrav, Hunger Incarnate

Haste, Menace
Bloodthirst {x} (If an opponent was dealt damage
this turn, this creature enters the battlefield with
{x} +1/+1 counters on it)
Vampires you cast have Bloodthirst {x}, where
{x} is the number of +1/+1 counters on
Kalokrav, Hunger Incarnate