The Xyz Monster is a type of creature in the Yu-Gi-Oh! trading card game. It is characterized by its unique summoning method, which involves overlaying two or more monsters of the same level. This allows players to create powerful monsters that can have various effects and abilities, enhancing their strategies during gameplay. Xyz Monsters are identified by their black and white card design, featuring a rank instead of a level. They often have effects that can manipulate the game state, such as removing cards from the field or altering attack points. Players can use Xyz Monsters to gain an advantage over their opponents in battles.