Legion, Many as One

Possess {5}{b}{b}{b} (If you cast this spell for it's possess cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature. If enchanted creature belongs to another player, tap that creature and you gain control of it as long as it remains enchanted)
Trample, Indestructible
Legion, Many as One and enchanted creature each have +5/+5