I've come to distribute one thing from my friend.
Side note;
less of a rule more of a precedent but I get your point.
Actual things worthy of primary note.
There seems to be compelling arguments for the down grade in this one instance, Loydblitz and TheOrangeguy you are both taking the context of 'destroy everything' very literal from someone who has repeatedly wanted to rule everything even in the comics there is that page... This comes from the Garmadon comics Garmadon issue #2
Note the line "land of ash"
This implies they'd turn things to ash but less of a destroy the realm in its entireity if we are taking it literally with what Garmadon says as far as destruction such as what Loyd and TheOrange are saying ... that still leaves matter now converted to ash and an entirely untouched 4th dimension of time as there would still be a future in a land of ash according to the implication Garmadon could still rule over it hypothetically. The comics Garmadon take place after the episode Ending season 10 episode 4
Still a future, not a 2-C feat then involving the space-time
This happens after the Oni's invasion and before the 11th season. The Image Comics line from what I know is canon.
Sorry to grab the one scan from the comics on you.
Turning things to 'ash' given the cloud and Garmadon's own admission.
Before someone says something about the comics...
This is pulled straight from the Ninjago Wiki:
"It is confirmed to be canon by multiple sources, though the TV series does not acknowledge its events. This is likely due to the fact that the comic series was not planned until after
Crystalized had already been written." There is an interview from the author as well that goes over parts of canon, in addition to Lego and Skyline Comics saying they were going to do it, the only inconsistency being the helmet aspect and non-mention by the tv series.
Hopefully the comics provide further context in this case? (Also did you get into the calc group recently? If so that's awesome! if it was a while ago I must not have seen it previously but that is still awesome!)