5 / 5
Flying
Whenever a creature dealt damage by Baron Sengir this turn dies, put a +2/+2 counter on Baron Sengir.

: Regenerate another target Vampire.
The Baron’s ability will only regenerate creatures with type “Vampire,” regardless of whether the creature has “Vampire” in its name.
Although Baron Sengir is now a Vampire, it still can’t regenerate itself.