Toastman

 T  oastmen are a species that resemble a minor charachter from  The Amazing World of Gumball, Anton, and are formerly secondary villains in   The Amazing World Of Gumball  season 3 episode, " The Recipe ." They look a lot like the original   Anton.

Unlike Anton (who is also now very smart and invulnerable to attacks), they are very smart and has immortality in order to avoid deaths), are invulnerable to all forms of attacks, and due to their antagonism against Gumball and Darwin, they are now friendly to humans, dylanuses and other sapient species, except vampires, dragons, bonggambies and their allies due to bloody conflicts with them.

Because since they are a food species, they are not consumable by humans, dylanuses and other sapient species, even ducks.