Glistening Oil

Aceite iridiscente (Glistening Oil) (es)

Enchantment - Aura (CMC 2)
Enchant creature
Enchanted creature has infect.
At the beginning of your upkeep, put a -1/-1 counter on enchanted creature.
When Glistening Oil is put into a graveyard from the battlefield, return Glistening Oil to its owner's hand.