Mask of the Schemer {2}{U}
Artifact — Equipment
Whenever equipped creature deals combat damage to a player, it connives X, where X is the amount of damage it dealt to that player. (Draw X cards, then discard X cards. Put a +1/+1 counter on that creature for each nonland card discarded this way.)
Equip {2}
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Cards that do something similar expected a card that isn't here?
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Swordsman, Sharp Scoundrel 81%
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"Whenever an equipped creature you control attacks, it connives."
Bark of Doran 80%
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"As long as equipped creature's toughness is greater than its power, it assigns combat damage equal to its toughness rather than its power."