Jade Idol
Mana cost
Mana value4TypeArtifact
Color identity
Colorless
RarityUncommon
SetChampions of Kamigawa (CHK)
ArtistBen Thompson
Price€0.11 · foil €0.43 · $0.13
Jade Idol 
Artifact
Whenever you cast a Spirit or Arcane spell, this artifact becomes a 4/4 Spirit artifact creature until end of turn.
Before the Kami War, the shishi were symbolic guardians, protecting the shrines where they stood. But after the kami turned on the material world, shishi began pouncing from their perches to attack would-be supplicants.
Legality
CommanderLegalStandardNot legalPioneerNot legalModernLegalLegacyLegalVintageLegalPauperNot legalBrawlNot legalOathbreakerLegalHistoricNot legalTimelessNot legalPenny DreadfulLegal
Rulings
2008-08-01
A noncreature permanent that turns into a creature can attack, and its abilities can be activated, only if its controller has continuously controlled that permanent since the beginning of their most recent turn. It doesn’t matter how long the permanent has been a creature.