Chester, Rogue Treasure

Party Member, Wither

Perfect Disguise-{2}: Chester, Rogue Treasure becomes an artifact Treasure with "{t}, Sacrifice this artifact: add one mana of any color." and loses all other card types until end of turn.

Surprise Attack-{6}: If Chester, Rouge Treasure is
an artifact Treasure, it becomes a 10/6 legendary shapeshifter rogue artifact creature with wither and fear until end of turn.