This knight decapitated himself so his headless horse wouldn't feel self-conscious.
Thanatos is an enemy fought at the Ancients' Maze. They are moderately dangerous foes, as their physical attacks can inflict a decent chunk of damage to a character, and in the 3D remakes it can attack twice in one turn. In addition, it can also attack with the Breakga spell to inflict Petrify.
Thanatos is a boss fought at the Labyrinth of the Ancients.
Thanatos is an enemy fought at Pazuzu's Tower and Doom Castle. It a dangerous foe as it has access to a wide array of abilities, including Cure to restore its HP and the Instant Death ability Doom Dance.
Thanatos, or Thanatus, is the dæmon personification of Death in Greek mythology.