The Final Cut

Kicker—Sacrifice a creature.
Target player reveals their hand. Choose a
nonland card from it. That player exiles that
card. If this spell was kicked, as long as the exiled
card has the same mana value as the creature you sacrificed, for as long as it remains exiled, you
may cast the exiled card. You may spend mana
as though it were any mana type to cast it.
I never had the nerve to make the final cut.