Seeker of Indeterminacy

Flying
Whenever a player casts a spell from exile, each
player entraps the top card of their library. (Put
those cards onto the battlefield face down as 0/1 Mine artifact creature with defender and "When this
creature would die, instead turn it face up and exile it.
If it is a nonland card, cast it without paying its mana
cost." Players may not look at those card while they
are face down.)