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 it.

At the beginning of your end step, exile the top X cards of your library, where X is the number of permanents your opponents control with stun counters on them. You may play these cards until
the end of your next turn.