After personal experience, Ian can responsibly say that Aether places a significant burden on life.
This is an extremely advanced energy, causing unquantifiable micro-changes in the surrounding space-time. If used by ordinary people, even if Aether does not actively harm people, the changes it brings to the material world are enough to be deadly.
Only True Dragons and some extremely powerful Ancient Demonic Beasts can withstand the erosion of Aether, even Crystal Dragons cannot. The reason Aether Crystal Dragons can is due to their atavistic Ether Stardust Dragon bloodline.
According to predictions, Ian believes that for organisms and tools that can use Aether, the minimum level should be 'Interstellar Colonization Grade'.
