Oracle Text

Living weapon (When this Equipment enters the battlefield, create a 0/0 black Germ creature token, then attach this to it.)

Equipped creature gets +4/+4 and has vigilance and lifelink.

3: Return Batterskull to its owner's hand.

Equip 5

Card Rulings

6/1/2011 The ability to return Batterskull to its owner’s hand can only be activated if Batterskull is on the battlefield. If Batterskull is no longer on the battlefield when the ability resolves, it will have no effect.