John, Jank General

When John, Jank General enters the battlefield,
exile the top twenty cards on your library. After
you play a creature, enchantment, or
artifact, you may put an instant, sorcery,
or planeswalker exiled by John, Jank General
into your hand. After you play an instant,
sorcery, or planeswalker, you may put a
creature, enchantment, or artifact exiled
by John, Jank General into your hand.