Seeking Symbiote

Living weapon (When this Equipment enters the battlefield, create a 0/0 black Symbiote creature token,
then attach this Equipment to it.)
Equipped creature gets +2/+2 and has "Pay 3
life: Adapt 2. (If this creature has no +1/+1 counters
on it, put two +1/+1 counters on it.)
Equip—Pay 3 life. (Pay 3 life: Attach to target
creature you control. Equip only as a sorcery.)