High Mage Atenza is one of the Mages in Yu-Gi-Oh! Forbidden Memories. He is located at the Mountain Shrine. The Prince faces him after defeating the Mountain Mage. The Prince duels and defeats him taking the Millennium Ring.
It is possible to win the cards "Harpie's Feather Duster" and "Invisible Wire" after receiving a TEC rank for defeating High Mage Atenza.
He also appears as an enemy Marshal in Yu-Gi-Oh! The Falsebound Kingdom, named Atensa.