Mask of the Schemer

策謀家の仮面 (Mask of the Schemer) (ja)

Artifact - Equipment (CMC 3)
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