Myris, Mistress of Metal

Artifact spells you cast cost {3} less to cast.
You may only cast one spell on each of your turns and only if that spell is an artifact spell.
You cannot cast spells on your opponents turn.
Whenever you cast an artifact spell, if no mana was spent to cast it, you may return Myris, Mistress of Metal to its owners hand.
"With my power, the world will drown in metal!"