Palladium is described as an image of a nation's safeguard or source of protection.
In this case, it could possibly refer to Mahad himself, and his willingness to sacrifice his own life in order to ensure the safety of Pharaoh Atem.
The needle-like jewelry on this monster's belt resemble the pointers found on the Millennium Ring, possibly as a reference to Mahad being the user of the Millennium Ring while he was alive.
Both monsters are the retrained counterparts of "Blue-Eyes White Dragon" and "Dark Magician", both of which are rival monsters in the Yu-Gi-Oh! manga.
Both monsters feature opposite Attributes of each other, which are the opposite Attributes of their original counterparts; this monster is a DARK monster while "Blue-Eyes" is a LIGHT monster, while "Mahad" is a LIGHT monster and "Dark Magician" is a DARK monster.
Both monsters are depicted in mirrored poses; this monster is depicted facing right at an upwards angle, while "Mahad" is depicted facing left at a downwards angle.