Successor of Blood

Whenever a creature your opponent controls dies,
put a +1/+1 counter on Successor of Blood.
{1}{t}: Create a Blood token. (It is a colorless artifact
token with "{1}, {t}, Discard a card, Sacrifice this artifact: Draw a card.")
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
Persist