Sinewstrider

Living Weapon (When this Equipment enters the
battlefield, create a 0/0 black Germ creature token,
then attach this Equipment to it.)
Equipped creature gets +1/+1, has wither, and
has "{b}{r}{g}, {t}: This creature fights another
target creature. If that creature dies this turn,
return it to the battlefield under your control
and attach Sinewstrider to it."
Equip {3}