It That Consumes

Parasitism {b} ({b}, {t}: This creature loses this ability
and becomes an Aura enchantment with enchant
creature. Attach it to target creature. You may pay {b} to end this effect.)
At the beginning of your upkeep, put a -1/-1
counter on enchanted creature, then create a 1/1
green Licid creature token with "Enchanted
creature gets +1/+1" and parasitism {g}.