Nox the Decayer of Minds

At the beginning of your endstep, each opponent
mills X cards where X is the amount of cards that
were put into your graveyard from your library
this turn.
{1}{b/g}, {t}: Exile target card from a graveyard. If
it was a creature card, create a 2/2 black zombie
creature token, then if it was an artifact or
enchantment card, put a +1/+1 counter on each
Zombie you control.