Erizel Markov, Impure Sire

Menace
At the beginning of each end step, put a -1/-1
counter on each other creature. For each
creature that died this way, create a Blood token.
If a Human died this way, create two of those
tokens instead.
Sacrifice five Blood tokens: Erizel Markov gains
your choice of flying, lifelink, or double strike
until end of turn.