Exterrimancer

When Exterrimancer enters the battlefield or
attacks, look at target opponents hand and choose
a nonland card from it. Exile that card.
{t}: You may play cards exiled with
Exterrimancer from exile this turn, and you may
spend mana as though it was mana of any color
to do so. Exterrimancer falls asleep.
Whenever an opponent discards their second card
each turn, Exterrimancer awakens.