Heibei Mingyun, Abyss Mother

Endow {g}{g} (If you cast this card for its Endow
cost, it's an Aura spell with enchant creature. If the
enchanted creature would die, instead destroy this
Aura.)
Immortal, Torment (This creature must block and
must be blocked.)
Enchanted creature has Immortal and Torment.