Gremmy Thorneaux has one of the most overpowered abilities in any anime, not just Bleach. The Visionary makes anything he imagines into the truth of the world around him. This should make him omnipotent, all-knowing, all-powerful, and any other form of absolutely powerful he can think of. It might even make it enough to beat the Quincy King; that's how much it defies common sense. Gremmy will remain in a position to dominate for as long as he believes he can. This power is invincible on paper.
Source：https://www.cbr.com/bleach-tybw-kenpachi-vs-gremmy-visionary/
