Thanos was subject to the Deviant gene at birth. As a result, Thanos became like that of a 'mutant' of Titan (the sixth moon of Saturn) where he developed a purple, hide-like skin which allowed him to absorb cosmic energy at an atomic level, then manipulate it into kinetic force by conscious choice. Along with strength and other physical abilities making him the most powerful Titan. The mutation also augmented the powers he possessed as a descendant of the Eternals.
People don't generally think of Disney characters as particularly scary (unless you're talking about villains like Ursula or Maleficent, anyway). There's certainly nothing frightening about Disney's princesses and princes, right? Think again -- things are getting post-apocalyptic. DeviantART user Kasami-Sensei has re-envisioned the sweet and innocent protagonists of several Disney films in the style of zombie hunters (and a zombie) from The Walking Dead...