Name: Osira
First Appearance: Wonder Woman #231 (1977)
Creators: Martin Pasko, Alan Brennert, and Bob Brown
Abilities: The ability to project pyramid shaped energy blasts. Can form a pyramid force field around herself and others which allow for flight, and can imprison those sealed within them. Can control minds by creating energy pyramids on a worldwide scale. Ability to compel the dead to possess the bodies of the living.
Backstory: Ancient alien from another world, galaxy, and dimension who hailed from a time nine thousand years in the past. Osira was part of a space fleet which left her planet for reasons unspecified, only to wind up lost when a freak meteor shower struck the fleet, sending ships hurtling and crashing into different universes.
Osira and her husband Hefnakhti would crash land on Earth where upon they used their powers to bend the minds of humanity to their will, conquering the planet and proclaiming themselves to be gods. They would force humanity to construct the pyramids, for pyramids were a source of power which Osira and Hefnakhti drew from, growing in strength and power so long as they were within a certain distance of any pyramidal structure.
Thus they would rule the world for millenia until the high priest Anankh guided by the Egyptian gods sealed them away in one of their own pyramids for three thousand years. Kept alive by her own powers, Osira would live while her husband who looked identical to Steve Trevor would tragically perish until she was awakened in the modern day and freed from her prison.
Now returned to the world, Osira swore to use the accumulated pyramid power of millennia to bring peace to the world. For only by removing humanities free will and making their only motive being to worship as a goddess who obeyed her every will would the world be a better place as far as she believed.
