Tibbers comes from League of Legends, released by Riot Games in 2009, where the child mage Annie carries a stuffed bear that becomes a flaming monster when she uses her ultimate. The shout became a shorthand among players for an Annie play about to turn a fight, and clips of the stretched call spread through gameplay videos, streams and soundboards detached from a full match. It stays popular because one recognisable name tells League fans exactly what is arriving, even in unrelated edits.