Larry Niven wiped out 1.5 x 10[sup]12[/sup] in the last act of The Ringworld Engineers (though he retconned it away in the next sequel).
I’m not that violent, I’ve only killed about a half-dozen thugs guarding a drug dealer’s mansion.
Does reordering reality so that they never existed count as killing? And does killing the same person multiple times count as multiple people or just one? And does it reverse it if they got better?
Because I’ve had a story where I actually managed to destroy the better part of a plane of reality, get it back, destroy it again, and then finally restore it mostly without permanent damage, so I’ve killed somewhere to the order of say… trillions even not counting each one multiple times.