dirtlord
Skeletron Prime
For some reason the steampunker isn't selling the steam punk boiler I've met the conditions on the wiki and it doesn't say that it's not in mobile any suggestions (also there are a few other items with this problem such as the exploding bunny) I would re beat the bosses (which by the way is an odd condition for a hardmode item) but there is no crimson left in my world to fight brain of cthulu in