Invasion of Vryn // Overloaded Mage-Ring (March of the Machine)

Battle Ñ Siege // Artifact - Invasion of Vryn: (As a Siege enters, choose an opponent to protect it. You and others can attack it. When it's defeated, exile it, then cast it transformed.)
When this Siege enters, draw three cards, then discard a card. // Overloaded Mage-Ring: {1}, {T}, Sacrifice this artifact: Copy target spell you control. You may choose new targets for the copy. (A copy of a permanent spell becomes a token.)