Genshin Impact has confirmed the arrival of Yelan to character event-wish banners in the upcoming 2.7 patch update. Players have already seen glimpses of Yelan from Archon Quest in The Chasm.Yelan is said to be a 5-star Hydro character and fans have already gotten to see her in action through various 2.7 beta leaks. Players eager to summon Yelan can start to pre-farm materials for her. Collecting materials in advance will help players put Yelan on the field as soon as possible. All the materials for her ascension and her talent level-up books are already available in the current version of Genshin Impact.Genshin Mains - Your Guide to Teyvat@genshinmains#Yelan farming materials#原神 #Genshin5:21 AM · Mar 30, 2022107881537#Yelan farming materials#原神 #Genshin https://t.co/trmWiSg4DTThis article will cover all the boss materials and talent books that players will need to max out Yelan in Genshin Impact.Genshin Impact: List of Boss materials and Talent level-up Books for YelanBOSS MATERIALRuin Fang from Ruin Serpents (Image via HoYoverse)Yelan will need a boss material called Ruin Fang that can be obtained from Ruin Serpent, a new boss added with the 2.6 patch update. Players can find these in The Serpent’s Cave of The Chasm: Underground Mines. Yelan will need a total of 46 Ruin Fangs to max out her ascension level.However, players will first have to complete a world quest called "Surreptitious Seven-Star Seal Sundering” to access The Chasm: Underground.Players must make sure to equip the Lumenstone Adjuvant gadget to fight more efficiently against the Ruin Serpent. The Ruin Serpent has 70% resistance to Physical attacks, so players are advised to use teams that rely on Elemental attacks as their main source of damage.TALENT LEVEL-UP BOOKSTeachings/ Guide/ Philosophies of Prosperity (Image via HoYoverse)Yelan will require Prosperity talent level-up books from the Taishan Mansion domain found in Liyue. Players can farm the Teachings/ Guide/ Philosophies of Prosperity talent books on Mondays, Thursdays, and Sundays.To max out one talent, players will need the following talent level-up materials:Teachings of Prosperity x 3Guide to Prosperity x 21Philosophies of Prosperity x 38Chtholly@gankissesqingtomorrow i will be done with yelan books yay~ i think until wednesday i should be done with all her materials TT9:01 AM · Apr 10, 20222tomorrow i will be done with yelan books yay~ i think until wednesday i should be done with all her materials TT https://t.co/6fGjlVr39AHence, the total number of talent level-up material players will need to max out all three of her talents are:Teachings of Prosperity x 9Guide to Prosperity x 63Philosophies of Prosperity x 114Since all types of talent books can be farmed on Sundays, players need to make sure they complete the correct challenge to obtain Prosperity talent level-up books. On Sundays, keep in mind to complete the “Domain of Mastery: Altar of Flames” to receive Prosperity Talent level-up books.This is everything players need to know about the boss materials and talent level-up materials to farm for Yelan in Genshin Impact.