Mary Poppins, Wondrous Bard

Flying, Vigilance, Prowess
Whenever Mary Poppins attacks, exile the top
card of any player's library. You may play that
card this turn, and mana of any color can be
spent to cast it. This ability triggers only once
each turn.
Whenever you cast an instant or sorcery spell,
put a Menace counter, Vigilance counter, or
Flying counter on target creature you control.