The true final boss from the metroidvania indie game "Hollow Knight". Known as one of the hardest bosses in the game with its wide variety of combo attacks to throw the player off. This fight also has two versions, Radiance and Absolute Radiance. The Absolute Radiance is only accessible by completing the Pantheon of Hallownest, a gauntlet of every single boss in the game.
Person A: Hey I beat the Radiance yesterday, it was really hard
Person B: Then get good noob