The guild obviously knows where the other islands/locations are. They said this is the safest among the sites to obtain that elixir. Also since its the safest they have already mined the veins and stuff. So they are going for the burn the intestine and get it from the monsters method.
An...
I know its a turn off the brain goofy series. But seriously for one sec.
Guild said this is the safest place from which that elixir can be obtained. And that shit is in very meager 10gm/monster at most quantity. So If the world was in such a peril why doesn't the fucking OP MC go to other more...
Aren't Mage Corps primary requirement being able to efficiently perform currently available magic. Innovation is a welcome bonus, but shouldn't that 3 news spells be a requirement for Academic/research purposes? He could still be employed as a combat mage albeit with tha caveat they test his...