Marve' Favello, Defier of Dark

Haste
Whenever Marve' Favello, Defier of Dark attacks you may pay {r}{r}{x}, if you do, deal X damage to up to two target creatures.
Whenever Marve' Favello, Defier of Dark blocks you may pay {u}{u}{x}, if you do, return up to two target creatures with converted mana cost X or less to their owners' hands.