Ectorphius III

Ectorphius III is a Bioronum, a discolored slug/humanoid/lombax hybridian biological entity of hidden powers. Mainly the one which makes him invincible to mustard. All Bioronums are invincible to something; Red ones can't overheat, Yellow ones can't have megacranial disfractures, Green ones can't over-oxygenate, Cyan ones can't freeze, Blue ones can't drown, Purple ones can't under-oxygenate, and White ones can't suffer from low blood pressure. If they exist, Black ones are immune to light, meaning they're invisible, which explains why no-one knows if they exist or not.