Ben 10 (Saga 04) Omniverse S06E57 No Honor Among Bros The Worst Transformation

The Worst is ostensibly completely indestructible on the outside of his body; he is able to withstand heavy physical attacks due to his soft, blob-like body. The Worst has malleable skin, allowing him to absorb any physical impacts. The Worst can survive energy attacks, such as Exo-Skull's laser. The Worst is resistant against extreme heat and immune to lava. The Worst is naturally resistant to poisons.