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If you crash him into a strong card you want gone or your opponent dares to challenge him themselves, his banishment gives you a free draw

Definitely one of the cards to look towards for an aggressive Giants deck

(They're artifacts with " , Sacrifice this token: Add one mana of any color.") , , Sacrifice another permanent: Flip a coin

On top of that, when you sacrifice it, you get tempted by the ring, making it an auto addition to decks that care about the mechanic, or just to at least make something harder to block

We've seen in the past how this card can be a major deciding factor in games if left unchecked, and, if the current top end decks take a dive, Wandering Emperor could rise up to take over