My form is justice. My form is the world! Revere me. Praise me. The noble and beautiful, immortal and most powerful god, Zamasu!
~ Fused Zamasu's birth.
Villains who are Deities, Gods or Entities override the most greatest, toughest possible level of power that they are equal to Cosmic Beings. Needless to say, these are some of the most powerful villains of all due to their natures. Most Deities are also Immortals but can still be destroyed with special items or if their universe is destroyed by a greater-scope villain.

To count as a deity, a character should also have been worshiped either in the past or present; some Deities may even require said worship to function at any level of their true abilities. Sometimes these beings rule the cosmos and do not want anybody to rule in their place.

Editing note: entities who share similarities with Deities but are not worshiped should go under the Cosmic Entity category instead.