Maggie, Reckless Menace

Haste

When Maggie attacks, for each opponent choose up
to one artifact or creature. Tap each permanent chosen this way and put a stun counter on them.

At the beginning of your end step, exile the top X cards of your library, where X is the number of opponents who control a permanent with a stun counter. Until the end of your next turn, you may play those cards.