So it was never actually technically confirmed if the trolla we saw in episode four was real or not but I don't really think it matters. Trolla's screwed either way. If the little magic left fades as you get further from the swords, then trolla, an entire planet in a different dimension, is going to run out of magic VERY quickly. Trollans are also all seemingly reliant on a good amount of magic to live. Orko was having enough trouble even with his closer location, lack of competition (eternians can at least seemingly survive longer without it and thus aren't as desperate), marginal supply of magic water, and someone to take care of him. What about literally everyone on Trolla, who wouldn't have those advantages? Society would collapse within a month. And unless they had a way to preserve magic, or were able to selectively transfer magic to one another, they don't have much of a chance :(

What if the Timeless Dimension has its own "energy"? It need not be the "magic of creation" that's at the core of Eternia. But just some force of its own. In previous MotU canons Despondos (another dimension) has its own energy which is powerful enough to affect other dimensions. (There was a whole arc in the 2002 comics where Evil-Lyn was poisoned by "Despondos energy".)

Maybe the Timeless Dimension and Trolla have "timeless energy" which could keep them alive until Eternia's magic of Creation is restored and can reach them again.

Orko can really say whatever he wants about his culture and the Eternians have to be like:

faques

Trollans

Remember kids, don't get your Orko wet and for the love of the Goddess! Don’t feed him after midnight!