Vidad, Ghoulcaller of Binem

Haste
At the beginning of your end step if one or more nontoken human creatures your control died
this turn you may {t} Vidad, Ghoulcaller of
Binem and place that many grave counters on it
then create that many Permission tokens.
Sacrifice 10 grave counters: Transform Vidad, Ghoulcaller of Binem into Call to Binem's Aid.