Ryze Ultimate + Karthus Ultimate.
Karthus ult damages Any champion on the feild. regardless of where they are. When Ryze uses his ult and stands in the realm warp, he is immune to karthus ult within a 2 second timeframe, both 1 second before and during the warp. That should be fixed. His ult Does not create a statis or a 'zhonyas' type of effect. If it Does, it should state that clearly. I hate playing bugged games. Per the website https://na.leagueoflegends.com/en/game-info/champions/Karthus/ states After channeling for 3 seconds, Karthus deals damage to all enemy champions.
After channeling for 3 seconds, Karthus deals 250/400/550 (+75% Ability Power) magic damage to all enemy champions (regardless of distance).
Riot, please fix, thanks