Enchant artifact
When Mightstone's Animation enters, draw two cards, then discard a card.
Enchanted artifact is a creature with base power and toughness 4/4 in addition to its other types.
A keyword ability that defines what an Aura spell can target and what an Aura permanent can be attached to. See rule 303, “Enchantments,” and rule 702.5, “Enchant.”
