Angel of Mimic
You never had your own appearence, your own style. You only could copy evrything you saw from others. When you kill a monster, he's weaponry is your's weaponry. But beware, for some monsters have something more than weapons to knock you down - something you're not able to copy. Also, you can't wear armor and wield weapons.
Watch out of LS
EDIT: And I suppose we've ran out of possible ideas that are a challenge. Everything that can be a good challenge is already proposed. So I say that it would be better to include a different play modes into the game, and do not call it an angel, for it's more a different game, not a challenge