Buffs for Cass
An evolve for her spells like khazix/viktor where she instead collects shuriman artifacts to level up Q, W, E, R but only for two spells.
Q evolve: higher base damage and reduced CDs if it lands
W evolve: be able to cast twice
E evolve: damage increases for each consecutive attack by %
R evolve: bigger radius and ult distance
Anyways I'm horrible at balancing things but I'll just leave it to you guys for the criticism