How many XP books do you need to reach level 90 in Genshin?

Still learning the ropes of the Genshin Impact grind? Here's how many XP books you need to reach level 90, including the easiest way to farm them.

I leveled most of my genshin characters up with the purple book up to level 20. It says “after character reaches max level they cannot gain further exp.” What does that mean?

How many XP books do you need to reach level 90 in Genshin?

Resources from 0 to 70, Resin included! : r/Genshin_Impact

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The amount of hero's wit and enchant ores needed for 90 : r/Genshin_Impact

Hero's Wit needed, visualized. : r/Genshin_Impact