It can be made from one bathus bar, requiring level 12 Smithing and giving 20 experience. It is a possible drop from the Bulwark beast, or you can get it from starting table of dungeon. While Dungeoneering, the Bathus hatchet is commonly used, as the Smuggler sells them (rather than smithing one) for a little over 1,000 coins. However, the marmaros hatchet is more desirable as its price is still low at 2,000 coins and players usually wish to get the highest available tier.