Tentrax

A Tentrax was a creature from somewhere in the Mutter's Spiral. It was a horned reptile with claws. It was noted for its cruelty, which was why the Daleks captured one. They planned to isolate this quality and apply it to a new breed of Daleks when they would make the New Earth System into a Dalek breeding ground. (COMIC: Doctor Who and the Dogs of Doom)