Below, we explain everything you need to know about extreme trials in FFXIV, as well as where to ... Reach or to the Rowena’s Representative in Kugane for loot. The extreme version of Rathalos ...

and the representative in Kugane sells Stormblood stuff. There’s also Mowen’s Merchant in the Crystarium for Shadowbringers gear and the Agora Merchant in Old Sharlayan for Endwalker gear.