Spellshift
Mana cost
Mana value4TypeInstant
Color identity
Blue
RarityRare
SetPlanar Chaos (PLC)
ArtistStephen Tappin
Price€0.24 · foil €1.34 · $0.25
Spellshift 

Instant
Counter target instant or sorcery spell. Its controller reveals cards from the top of their library until they reveal an instant or sorcery card. That player may cast that card without paying its mana cost. Then the player shuffles.
Legality
CommanderLegalStandardNot legalPioneerNot legalModernLegalLegacyLegalVintageLegalPauperNot legalBrawlNot legalOathbreakerLegalHistoricNot legalTimelessNot legalPenny DreadfulLegal
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.