After the maintenance, normal mode Von Bon gain invincibility frames while attacking, leading up to the other dimension of himself being unkillable when he is attacking back, allowing him to use his full screen instant kill.
Also all of normal Vellum attacks (unburrowing and the poison spray) instantly kills you.
Well Vellum poison spray instant kill despite showing a fixed damage.
Well Vellum poison spray instant kill despite showing a fixed damage.