User blog comment:MrGenial11/Togashi resurfaces/@comment-10145707-20151029161807

I've heard of it before.

A continent suddenly appeared in the middle of the ocean. Nature which we had never seen before was found there. New species which exceed our imagination and precious mineral resources were present.

People called this continent "Magmel".

Every year, 3 million people go there on expedition but actually,  950,000 people disappear there.

Specialists called "Angura-" (拾人者) go to Magmel on request to search for and rescue people (I think). There is also something about "inyou" which I can't really understand.

-->因又（インヨウ）

The inyou make use of strange powers called "Rakuto" to save people from the huge creatures of Magmel.

http://kaketayo.net/gunjyo-no-magumel/

I may be wrong about the rescue of people but they do defeat creatures.

Anyway, you can read the manga in japanese here.