Quandrix, the Proof

Mana cost: {4}{G}{U}

Type: Legendary Creature — Elder Dragon

Flying, trample Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.) Instant and sorcery spells you cast from your hand have cascade.