Parasitic Tendrils

Living Ink (This is a creature while not attached.)
At the beginning of your upkeep, put a -1/-1
counter on equipped creature and an age counter
on this. Then, if there are four or more age
counters on this, exile it, then return it to the battlefield transformed.
Equip {b}
Exo-Parasitic {2}{b} ({2}{b}: Equip target creature
you don't control.)