Ed continued his teachings until the three skeletons exhausted their mana. Their pool was seemingly only half of Ed's own. The mana circulation of Drench and Zephyr was also slower than Trench's who had a core. Their body was simply not suited for the job.
There was another thing that Ed had tried. He used Zephyr as a crystal and it had worked! That was a fatal weakness! At the very least it wasn't obvious since no one would expect such a thing but… it was a sad finding…
'The only positive is that they recharge themselves' Ed jested as he prepared himself to head back into the system space.
Now that everything was orderly, he could easily finish the rest of the stored up skeletons and turn them into mages.
'I can't upgrade the rest without heading up to the orc plains first though' It was either that or training up his crystallize skill. And of the two, he would much rather do the latter.