Spellshift
Planar Chaos — rare
Instant
Spellshift rulings:
2007-02-01: If the targeted spell can’t be countered, it remains on the stack and the rest of Spellshift’s effect continues to happen.
2007-02-01: If the revealed instant or sorcery card isn’t cast, it gets shuffled back into the library.
2007-02-01: If there are no instant or sorcery cards in the player’s library, the entire library is revealed and then shuffled.