Book of Incredible Energy is an Elyos NPC with the title Advanced Skill Scroll in AION Classic 5.0. It sells Holy Deluge VI and Heart Grip VIII among other goods.

Sells

Item	Price
Holy Deluge VI	1 ×[Event] Wildcard Coupon
Heart Grip VIII	1 ×[Event] Wildcard Coupon
Unwavering Devotion III	1 ×[Event] Wildcard Coupon
Shadow Walk II	1 ×[Event] Wildcard Coupon