Super Saiyan Infinity is the strongest form of the Super Saiyan transformation to ever exist. Though not canon, this form is so powerful that it can destroy the entire multiverse before you even notice. If he is careless enough to pull a finger, an entire solar system will seize to exist.
Guy 1 asks: Hey you know anything that can beat even beat Beerus?
Guy 2 says: Super Saiyan Infinity.