How to spawn boss/mob?

can anyone share knowledge on how to spawn boss/mob and which hfs file i have to mod? sorry if this was already asked D: and thanks in advance

You can't just spawn mobs/bosses, but in maps like the blood prince, you can spawn all of the bosses at once by changing your size to 10 via the console.

10 is not enough i think. Even 100 didnt trigger all, try 300+