Phyrexia
Phyrexia is a fictional plane in the Magic: The Gathering universe, known for its dark and mechanical themes. It is characterized by a blend of organic and artificial life, where beings are transformed into horrific cyborgs. The plane is ruled by the Phyrexians, a race of beings that seek to spread their ideology of perfection through the process of compleation, which involves merging flesh with machinery.
The central figure of Phyrexia is Yawgmoth, a powerful and malevolent entity who sought to dominate the multiverse. The plane is often depicted as a place of corruption and decay, where the natural world is replaced by metal and machinery. Its influence has been felt across various storylines and expansions within the Magic: The Gathering game.