Pentakill

A pentakill is the feat of personally killing all five members of the enemy team within a short window, the highest multikill the game recognizes after double, triple, and quadra kills. It is announced with a distinct callout and is widely regarded as one of the most celebrated individual achievements in League of Legends.

Pentakills usually happen when a strong carry cleans up a won teamfight, though teammates will sometimes hold back the final kill to let an ally complete it. While purely a prestige moment with no extra in-game reward beyond the kills themselves, securing one is a point of pride and a staple of highlight reels.