 X is portrayed as a mysterious and powerful immortal being whose visual design is defined by an entirely black character skin. His appearance is minimalist yet striking, often featuring a distinct white "X" symbol prominently displayed on his chest and back, which serves as his signature emblem. Despite his simplistic, shadow-like form, he is one of the most formidable antagonists in the series, possessing the unique ability to travel between different Minecraft worlds with every step he takes.