Saheeli's Lattice // Mastercraft Raptor

When this artifact enters, you may discard a card. If you do, draw two cards. Craft with one or more Dinosaurs {4}{R} ({4}{R}, Exile this artifact, Exile one or more Dinosaurs you control and/or Dinosaur cards from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) Mastercraft Raptor's power is equal to the total power of the exiled cards used to craft it.