The Archcurse

Enchant Creature
Enchanted creature loses all of its abilities. Target
creature attacks its controller for every upkeep
and gains "{4}{p/b}{p/r}: Sacrifice this creature. Target
creature returns to the battlefield under the
control of the player who casted The Archcurse."
"I believed that my death would save them... but
without doubt, it killed them all..."
— Grimlore