The second consequence for a world in the saturation phase was that global temperatures would become more extreme. While temperate climates, like in most of Europe, would remain largely unaffected, the poles and equator would see severe cooling or warming, respectively.
This was why Erik and his group still encountered quite a bit of ice along the way despite the warm season. Were it winter, they would have most certainly had to walk.
Last but not least was the main reason, besides revenge, why Erik and Elora were happy to be on Earth. The instability of aetherium and its integration with the world would allow for much faster strength growth compared to other worlds, not only in the absorption of aetherium but also in understanding glyphs and runes.
After all, the aetherium integration caused the world's elements to be in constant flux, allowing for a much quicker understanding of those elements.
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