Berserkir AxesPick it up to discover it.
FlametalPick it up to discover it.
BloodstonePick it up to discover it.
Black ForgeDiscover and use at level 4 or higher.
Discovery is separate from having enough materials to craft. Check shelter, fire, placement, and station access in-game. This checklist cannot diagnose broken mods or save files. Each alternative recipe is listed separately.