Ethersworn Sphinx (Sketch) [Modern Horizons 2]

Affinity for artifacts (This spell costs {1} less to cast for each artifact you control.)
Flying
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card with less mana value. You can cast it without paying its mana cost. Put the exiled cards on the bottom of your library in a random order.)