Mindtheft

Relay X (As an additional cost to cast this spell,
exile X nonland permanents you control. Return
it to the battlefield at the beginning of your next
upkeep. Creatures returned this way gain haste
until end of turn.)
Target opponent reveals X cards from their hand,
where X is the number of cards exiled by this
spell.
You may cast one of the revealed cards without
paying its mana cost.