watch 02:21 The Loop (Games) Do you like this video? “ Unrelenting. ” — In-game Description Onslaught is an Epic-rarity Harvesting Tool that came out Season 4 of Fortnite: Battle Royale. It is unlocked by completing 3 out of 5 of the Omega Challenges. Retrieved from "https://fortnite.fandom.com/wiki/Onslaught?oldid=81507" Categories: Epic Harvesting Tools Omega Set Community content is available under CC-BY-SA unless otherwise noted.