So I set out to unlock metal slime and She-Slime for Monstrosity, have searched online and haven't had much luck, searching for metal slime spirit and she-slime spirit pretty much only find you the BG link, on google, I've seen a few Metal Slimes pop into existance, but they seem nigh impossible to kill before they run away. I bought all the she-slime items but no luck , and I can't figure out why Metal Slimes do or don't pop.. and if killing them is all I need to get the spirits.
Any advice on this, and anyone know how to unlock the spriggans as well?