What is the most damage you've done in a game and with which Champion

100k Damage During the world's mission, I had to either win a game with Kai Sai/Kalista (don't remember) or do 100k damage. It took one game and I finished that mission. Turns out Karthus can easily deal that much damage if you play the Predator Pre-Fight Ult style

Edit: The match in question https://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2902861563/213593781?tab=stats