High Mage Martis is one of the antagonist of the game Yu-Gi-Oh! Forbidden Memories and Yu-Gi-Oh! The Falsebound Kingdom.
In Yu-Gi-Oh! Forbidden Memories he acted as one of the mages in the desert shrine, through the story he fought with Atem after the defeat of the Desert Mage, however he ended up defeated and gave his Millennium Scale.
In Yu-Gi-Oh! The Falsebound Kingdom named as Marthis, he is Emperor Haysheen assistant and a Marshall under the orders of Kaiba, later after Kaiba betrayal he is the boss of the following mission, he confronted Kaiba with his forces and stated to end his rebellion, but he was ultimately defeated thanks to the intervention of Pegasus and Labyrinth Ruler.