How it works
The book rarity must match the hero skill’s rarity. These books affect Expedition skills, not Conquest skills. The game calls them Expedition Skill Manuals.
Variants
| Item | Effect | Quality |
|---|---|---|
| Rare Expedition Skill Manual | Upgrades a Rare Hero's Expedition Skill Level. | Rare |
| Epic Expedition Skill Manual | Upgrades an Epic Hero's Expedition Skill Level. | Epic |
| Mythic Expedition Skill Manual | Upgrades a Mythic Hero's Expedition Skill Level. | Mythic |