The Point of the is that, we can create Exorcism Scroll / Blue Exorcism Scroll through each of Special Skill Book (i-e Combo Skill book , Leadership Skill book, Polymorph Skill book, Horse Skill Book, Mining Skill book, Linguistic Skill book ETC) . Means we need to farm or get These Skill books to trade them with Sage/Uriel Or Mr Soon ( like crafting Poly-marble from Doctor.
As For Blue Exorcism Scroll, to reset the time , we need to use it x2/3/4 times for resetting the time. Means x2 or x3 or x4 Blue Exorcism Scroll for 1 Skill book..
EDIT: Forgot to mention one more thing, x1 Blue Exorcism Scroll decrease Time to read the next book ( 25% OR 33% or 50% ). Means Decrease of 6 hour or 4 Hour or 3 Hour.
The Idea looks Pretty lame tho... Well i want to let out the weight by Writing This Post/Thread.. As it distract me from other activities..