Daizayten

Hell on Earth or any other world for that matter is a good way to describe Daizayten's vision. He is a pure demon who enjoys the pain and suffering he inflicts as he dominates and eventually destroys a universe. Over time the whole process has become a game for this wicked creature, causing him to go so far as to allow survivors to believe there is a chance of defeating him. In all cases the outcome is usually the destruction of the universe and Daizayten becoming even more powerful.

As a multiversal demon, Daizayten is capable of passing between realities, although to do so he requires either a magical or physical break in the walls between worlds. Not surprisingly Earth is usually the place where he first appears due to the planet's unique properties.
In one reality Daizayten's games backfired and he was stripped of his physical form. However instead of leading to his defeat, the change in his nature allowed Daizayten to acquire host bodies that he could use to carry out his fiendish plots. However, the loss meant that when entering other realities he was first forced to locate a suitable host.
More recently Daizayten emerged in a universe where Zordon or Eltar had slain Rita Repulsa, and the forces of darkness had been almost wiped out. Lacking a suitable villain to possess, he chose to use others to fight for him, creating Weirdan as the leader of his army. It was in this universe that Nate Oliver managed to defeat Weirdan and inspired a rebellion against Daizayten's power. However since those fighting him did not understand the nature of their enemy, the outcome of the final battle was unknown.
At some point between the defeat of Weirdan and the final confrontation, Daizayten was summoned to an alternative timeline where he defeated Zordon before Rita Repulsa escaped and started on his plan to destroy the universe. Only the timely intervention of the Doctor and a group of displaced Power Rangers prevented him from doing so. Whether Daizayten eventually triumphed or whether he was returned to his previous reality following his defeat is also unclear.
Most recently Daizayten has continued to use underlings to carry out his plans, choosing the survivors of the universe he conquers as soldiers for future campaigns.