Silent Magician

Silent Magician is a light-type spellcaster monster. She has an LV archetype version of herself named Silent Magician LV8 as well as a newer standalone card simply named Silent Magician that was released sometime afterwards. This card symbolizes Yugi's reliance on Atem as well as Yugi's growth that leads him to surpass Atem since this card gets stronger as the opponent gets stronger, id est, as the opponent accumulates more cards in his/her hand. This was also the card that Yugi used to defeat Atem, showing that Yugi did indeed surpass Atem. This interpretation is further supported by the way Silent Magician initially starts out far weaker than Dark Magician, but by the time it reaches level 8, it has far more attack points than Dark Magician. This card is the last monster in the original Yu-Gi-Oh! series to declare an attack.