META Mirror = Atem

Atem (王アテム Atemu, lit. "king" from a kanji) is an ancient Egyptian pharaoh who had sealed his own spirit/soul within the mystical Millennium Pendant. His spirit then took on the identity of Yami Yugi, which resided in the body of Yugi Muto, after Yugi solved the Millennium Puzzle. It was stated once that Yugi is the modern day version of Atem.[3]. He is the centerpiece of the Yu-Gi-Oh! series next to Yugi and is the driving force behind most of the events that transpired during the series, with the exceptions of the Domino City Battles, Virtual World and the Grand Championship arcs. He is likely named after the Egyptian god Atum.

https://yugioh.fandom.com/wiki/Pharaoh_Atem