Iixiln, Stormdragon Adept

Instant and sorcery creatures you control have haste.
Sorcery spells you cast have flash.
Whenever you cast an instant or sorcery spell, you may pay {u}{r}. If you do, as it resolves, put it onto the battlefield and it becomes a creature with power and toughness each equal to its converted mana cost in addition to its other types.