[quote][b]Passive - Arcane Mastery[/b] When Ryze casts a spell, all of his other spells have their cooldown reduced by 1 second.[/quote]Mostly this. Also note that his Q (main source of damage) only has a 3.5 second cool down, provides passive cool down reduction, all on top of the 80% cool down reduction that's provided by the mode. Seems like you'd mash Q to win, it's really not something they can tweak easily like some of the other champions without disrupting his champion identity, so they just disabled him to make queues less pants on head stupid. They've done it before with other champions that especially broke certain gametypes, like Teemo in One for All where you'd have Five Teemos on a team mining up the entire damn map.