Character from House of the Dragon by George R.R. Martin
The Cannibal was the largest and oldest of the three wild dragons living on Dragonstone during the era of the Dance of the Dragons.
He earned his name because he was said to feed on dead dragons, dragon eggs, and hatchlings. Numerous would-be dragonriders attempted to claim him, but none succeeded. He survived the Dance and later disappeared from history.
The Cannibal was described as a huge, terrifying dragon with jet-black scales and glowing green eyes. His dark coloration and savage nature gave him an especially fearsome reputation, making him one of the most dreaded dragons ever known on Dragonstone.