Encantamento — Aura
Encantar artefato ou criatura
Quando Sabedoria do Historiador entrar no campo de batalha, se a permanente encantada for uma criatura com o maior poder entre as criaturas no campo de batalha, compre um card.
Enquanto a permanente encantada for uma criatura, ela receberá +2/+1.
If the enchanted creature leaves the battlefield in response to the triggered ability but the Aura is still on the battlefield, the Aura will be put into its owner's graveyard as a state-based action. In that case, the last time it was on the battlefield, it wasn't enchanting a permanent, and its controller will not draw a card.