Magnum Opus Units all have character arcs in order to evolve their Abilities. Magnum Opus users can only upgrade their ability if the trait is active. See below for "story arcs"

Magnum Opus Units all gain AD 

3 - 12% ? + 1% on Takedown
5 - 18% ? + 2% on Takedown

7 - 28% ? + 3% on Takedown
9 - 33% ? + 5% on Takedown
9 - Magnus Opus Units Learn From eachother, every cast, they copy an ability of another Magnum Opus upgraded ability randomly.

Prismtatic- All units have been upgraded

Emblem - Survive 4 player combats, instead of upgrading ability; gain 12% Damage Amp if you're an attacker, 12% Durability if you're a tank, scales with star level.

Evelynn - Start Combat Once in Each Row, and have Magnum Opus & Runeslayer Active.

Oriana - Apply 10000 Shields and be 2 star

Galio - Restore 15000 Health and has not been moved in 4 rounds.

Ashe - Play on 10 different hexes, and deal 25000 damage

Jhin - Deal Damage to 4 Different Players, and Attack 44 Times

Evelyn - Charm 100 Enemies, and take 100,000 Damage

Fiora - Score 25 Takedowns, and win 4 combats.