Read this while you are waiting for part3!
Destroyah's introduction:
Destroyah, a dark beast birth from space. Rely on planetary energy as his power (include ultraman's energy), it attacks a planet every six months. If the absorbed energy reaches the highest value, a violent reaction will occur and the entire planet will be destroyed. So it destroyed many planets in the universe.
Part1:
https://youtu.be/svRhVtXIGvE
Part3:
https://youtu.be/mNn6cfRMR38