Return
The mess caused by the cloud ended up locking Khan out of the training hall for the rest of his stay in the district, and he didn't even try to complain. The test had confirmed that a single week wouldn't be enough to master the new spell, so Khan gave up on the project and focused on recovering.
Peaceful days went by in which Khan did nothing but rest and stick to a relatively easy training routine. He let his body heal and absorb the absurd amount of mana gathered on the third asteroid while engaging in the usual social events of the district.
Life during that week was truly blissful. The problems of the surface seemed unable to reach the dock, and the general cheerfulness caused by the incoming celebrations added a layer of peace that prevented the arrival of crises.