Corsair Slaver

When Corsair Slaver enters the battlefield exile
target creature you don't control with less power
underneath Corsair Slaver until Corsair Slaver
leaves the battlefield.
Whenever Corsair Slaver attacks create a
number of treasure tokens equal to the power
of the exiled creature underneath Corsair Slaver.
(They're artifacts with "Tap, Sacrifice this artifact:
Add one mana of any color.")