Ravena, Shadow Shifter

Changeling
Shadow Magic Monk —This creature has
protection from instants and sorceries during the combat phase.
{x}{u/b}{u/b}: Ravena, Shadow Shifter becomes a copy
of target creature card on the battlefield with
mana value X, except its name is Flux, Shadow Shifter, it's legendary in addition to its other
types, and it has this ability and changeling.