The user starts to charge itself, building up tremendous energy until it creates a massive explosion dealing damage to themselves and the other players in the vicinity. The ally and self-damage is around half of the user's health before firing. Enemies, however, receive 200 damage no matter how much self-damage the user gets.
This weapon cannot kill the user with the self-damage it causes. No matter how much self-damage you get from it, you will always stay alive with at least 1 hp (meaning you get 0 self-damage if you're already at 1hp).