Pentakill is the highest multi-kill announcement in League of Legends, the multiplayer online battle arena game released by Riot Games in 2009. It triggers when a single champion kills all five opposing champions within a short window, with each previous kill building toward it through double, triple and quadra calls. Clips of rare pentakills became highlights shared on forums, YouTube and streaming platforms, and the announcer line escaped the game as a universal shorthand for sweeping five opponents or achieving something thought to be nearly impossible.