Apostle of Storms

Whenever you cast a noncreature spell, exile the
top card of your library. Until end of turn, you
may cast that card if it is a noncreature card.
At the beginning of your endstep, Apostle of
Storms deals 3 damage to any target.
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Keranos's storms may seem chaotic, but amid the
haze lies knowledge too potent and volatile for this
world. His lightning is but the surface.