Whoever designed the exam is either malicious or stupid.
Who in their right mind kills off trained magic users!? We already heard from Frieren that there is a decline of magic users, and that magic users are hard to train that takes resources and time. The first thought that comes to mind to...
I guess the ecosystem of the forest be damned. I see major increase in carnivores, thus a depletion of the herbivores in the area, and then a slow expansion of the forest boundaries.
@gregger What's interesting is that apartment complexes are actually older than Medieval Castles, one prominent example is their existence in Rome known as Insula. There have even been height limit laws implemented, one of the earliest air space laws imagined.
Wow... let's do the math...
Let's establish some numbers first.
Let's assume this guy only needs 1kg of Hydrogen.
Density of Air (Dair) = 1.225 kg/m3
Percentage of Hydrogen in the Atmosphere (PH) = 0.000055%
Let Mair rep. mass of air.
Let Vair rep. volume of air.
The amount of air this guy...