This page will cover details about the various Merchants, also known as Vendors, found in Remnant: From the Ashes.
There are two special world vendors that can spawn in runs of the Earth zone in Remnant: From the Ashes, Mud Tooth and the Mad Merchant. Much like events and bosses in Remnant, whether or not they spawn in a particular roll of a map is up to random chance, though they will spawn in specific areas or with certain cues you can use to help locate them in a run. Each has their own inventory of items to sell, with Mud Tooth offering a pair of unique buff potions. They both also have special items one can obtain that lead to further unlocks, the Pocket Watch and the Twisted Mask.