Grafted Wargear
Equipped creature gets +3/+2.
Whenever this Equipment becomes unattached from a permanent, sacrifice that permanent.
Equip 
(: Attach to target creature you control. Equip only as a sorcery.)
Illustrated by Alex Horley-Orlandelli
This printing
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If your Grafted Wargear somehow ends up on an opponent's creature and it then becomes unattached from that creature, you won't be able to sacrifice that creature because you don't control it.
You may activate this card's equip ability targeting the creature that it is currently attached to, even if it's the only creature you control. Since the equip ability costs zero, you can do this as many times as you like during your main phases, though it generally won't do anything.
Grafted Wargear becomes unattached from the creature it's equipping if you equip it to a new creature, if Grafted Wargear leaves the battlefield, if the equipped creature ceases to be a creature, or if Grafted Wargear ceases to be an Equipment. (It also becomes unattached if the equipped creature leaves the battlefield, but the triggered ability won't do anything in that case.)
