Lagiacrus is the flagship leviathan from Capcom's Monster Hunter Tri, released in 2009, where it was known as the Lord of the Seas. In the games, monsters enter an enraged state after taking damage, becoming faster and more aggressive, and Lagiacrus gains its crackling electrical attacks. Clips of its vocalizations circulate among Monster Hunter players on soundboards and in fan edits, where the enraged dash roar has become shorthand for a boss fight escalating beyond control.