Zelev, Arcane Infiltrator

Flying
Whenever you cast an instant or sorcery spell
with converted mana cost 3 or less it gains cipher,
then you may create a 1/1 blue and black Faerie
Rogue creature token with flying with the spell encoded onto it. (You may exile this spell card
encoded on a creature you control. Whenever that
creature deals combat damage to a player, its
controller may cast a copy of the encoded card without paying its mana cost.)