Grasp of Rot

Enchant Creature
Enchanted creature has "At the beginning of your upkeep, put a -1/-1 counter on this creature.
Then, put a -1/-1 counter on each other creature
that has a -1/-1 counter on it."
{2}{b}{g}: Create a token that's a copy of Grasp of
Rot attached to target creature. Any player may activate this ability at any time they could cast a sorcery.