This amazing black planeswalker is a powerful turn-2 play via mana accelerants, its +1 activation attacks your opponent's hand, and alternating between the discard ability and the sacrifice ability generates a lot of resource advantage
Furthermore, there are plenty of competitive Commander (cEDH) applications with the card as it essentially guarantees any win condition to resolve (such as Thassas Oracle), making it a desirable addition to any strategy that accommodates blue
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Skullclamp is an auto-include given most of your creatures will be in the 1-toughness range anyway
Knight of the Kitchen Sink, for example, has four different printings depending on which obscure kitchen utensil they've forgotten
Kotori, Pilot Prodigy Kicked out of its own deck by erstwhile cEDH stomper Shorikai, Genesis Engine, Kotori, Pilot Prodigy is still a decent card for a pure vehicles deck, where Shorikai is fine to just Unwinding Clock its way through your library
