Tzeench, Changer of Ways

Tzeench's power is equal to the number of
spells in exile.
Eminence— As long as Tzeench, Changer of a
Ways is in the command zone or on the battlefield, each player must scry 1 during their
upkeep.
Whenever a player casts a spell, any other player
may counter that spell. If they do, exile that spell
and its controller reveals and plays the top card
of their library.