Decided to (badly) edit and update a talent material chart by u/glompkenny! : r/Genshin_Impact
Here's your unseen Razor: Kamisato Ayaka banner's character material sheet! : r/Genshin_Impact
Genshin, Talent Upgrade Guide 4.1 - How To Get Level Up Books
Amount of materials needed per talent level, in case you wanted to grind it out ahead of time. : r/Genshin_Impact
Talent Level Up Materials
I made a material card for diluc :) : r/Genshin_Impact
Talent Guide, How to Level Up Talents
Talent Level-Up Materials Chart (Updated V4.1)
Character, Genshin Impact Wiki
All Characters, talents and Weapons materials needed : r/Genshin_Impact