Sethos is a four-star Electro bow user affiliated with Genshin Impact's Temple of Silence and is a vessel of Hermanubis. While little is known about him, Sethos is described as an energetic desert dweller who enjoys helping others. If you've managed to pull for him, here's everything you need to know about farming him to get the most out of him.
Mika Pre Farm Guide: Ascension Materials & Talents | Genshin Impact 3.5
You'll need Hero's Wit and Mora to level Sethos up to level 80 or 90. As a DPS unit on the field, he benefits from being level 80 at max Ascension, but since his Elemental Mastery doesn't drop, there's no rush to level him up to level 90.
You will need 420,000 Mora and the following materials to fully ascend Sethos to Ascension Level Six.
Sethos' local specialty is the Trishiraite, making him the first character to use this material for Ascension. It can only be farmed in the Girdle of the Sands region in Sumeru. His boss material is the Cloudseam Scale, dropped by Solitary Suanni in Chenyu Vale.