Inquisitorius Barriss omi costs 20 mats, although:
While in 3v3 Grand Arenas and if Grand Inquisitor is not an ally: Inquisitorius allies gain 30% Critical Chance and 50% Critical Damage.
Stormtrooper Luke is in German localization called out as a 3v3 omi, although:
While in Grand Arenas, and there is an allied Princess Leia, Stormtrooper Han, and no enemy Galactic Legends: Whenever Stealth is dispelled from a Rebel ally, ...
