Second Sun

Amonkhet's Second Sun is a celestial object of relevance in the plane's culture, both before and after Bolas's corruption.

Description
Described as a "magical orb", this object moves across the sky more slowly than Amonkhet's actual sun, casting the plane in light with rare instances of nighttime darkness. It eventually aligns with Bolas' horns in the middle of Naktamun, announcing his arrival and the start of the hours. This is revealed to have been a repurpose of the sun's original role in Amonkhet's culture as signalling the original Trials of the Five Gods.

The Second Sun's light is apparently the source of Oketra's arrows, while Hazoret is said to have been born from the same magic that created it, the "God-Pharaoh's breath". While Bolas deceived the gods into believing he created Amonkhet, the Second Sun is in fact natural to the world.

Nickname
Incidentally, Nicol Bolas was also known as the Second Sun on early Dominaria.