Artifact, 1 (1)
Rare
At the beginning of your upkeep, you gain X life, where X is the number of cards in your hand minus 4.
Valuing scholarship above all else, the inhabitants of the Ivory Tower reward those who sacrifice power for knowledge.
Illus. Margaret Organ-Kean

10/4/2004: If you have four or fewer cards in your hand when Ivory Tower's ability resolves, the ability has no effect.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander