Originally Posted by Black Francis

I see, i recently defeated him as well then i went straight away to the skeleton boss.

I don't really know in which sequence i should fight the bosses but ive been told after the Skeleton i should fight the Brain of Cthulu.

I don't like using a guide for that game cause i luv exploring and being surprised but because of that sometimes i get a little lost on what to do.

Forgot to say, there's obsidian you can get in that lava section.
i recently went down there too and found some along with like 3 hellforges but idk what to do with them yet.