Split Seconds

(You may cast a legendary sorcery only if you control
a legendary creature or plainswalker.)
Add {c}{c}{c} to your mana pool. Then exile every
card named Split Seconds in your library.
Rebound (If you cast this spell from your hand,
exile it as it resolves. At the beginning of your next
upkeep, you may cast this card from exile without
paying it's mana cost.)