Organ Donator

Animated Arms {1}{b}{b}. (You may play this for
its Animated Arms cost. If you do, equip it to a
creature you control, granting it the artifacts Power,
Toughness, and card text. When played this way, this
artifact is not considered a creature and is destroyed
when the equipped creature leaves play.)
When this deals lethal combat damage to a
creature, add it to your hand.