WoG - Planet Level Nova Blast

Question:
2. There's something you said in the Farsthey Feed that I dont understand, You said that a Toa of gravity could at least destroy a planet if he create a Nova Blast. But you recently said that all Nova Blast have the same potential of destruction, so any Nova Blast can destroy a planet? If so, when Gali has created a Nova Blast why this did not destroy the MU if she could have destroy a planet with a NB?

Greg's Answer:
2) Since the MU is an artificial environment, the odds are there are safeguards to protect other domes from a nova blast that takes place in one. But if you think about, most Toa powers would, if unleashed uncontrolled, have the ability to either do serious physical damage to a planet that might a) destroy it or b) render it incapable of supporting life or c) wipe out most of the life on a planet. If Gali's powers caused the sea level of Aqua Magna to rise sufficiently, maybe it floods most of the landmasses and kills much of the population.

Source:
https://web.archive.org/web/20230127122653/https://greg.thegreatarchives.com/2013-2017/page882