Mystery Key {1}{U}
Artifact — Equipment
When equipped creature deals combat damage to a player, sacrifice this Equipment. If you do, draw three cards.
Equip {1} ({1}: Attach to target creature you control. Equip only as a sorcery.)
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Cards that do something similar expected a card that isn't here?
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Foot Chopper 80%
$0.29#13178
"Whenever equipped creature deals combat damage to a player, you may sacrifice it. If you do, draw cards equal to its power."
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