A bathus bar can be smithed on an Anvil through the Smithing skill to create Bathus equipment, granting between 19 and 23.5 Smithing experience per bar used. A list of bathus items that can be smithed from bathus bars and the Smithing levels required can be found here. Five bathus bars are used along with 5 seeping elm branches to build a farming patch in the hotspot located in the start room of a dungeon.