Honing

Eiro looked down at the book that he was holding and let his mana flow through it. He had heard about the beneficial effects of Grimoires, but since they were rather hard to come by, the Demon had never been able to really confirm them for himself.

But one thing was for sure, this Grimoire did really seem to boost the flow of his mana quite a bit. Even just holding it slightly improved upon his mana's flow and versatility. It was just a miniscule amount, but every little bit counted in the end.

And then, Eiro tried out the part that really was most important to him directly. Usually, a Grimoire's main purpose was to help a spellcaster remember their spells. A lot of the time, considering the mental strain that any spell put on the caster, especially after a few years, many had a hard time concentrating or even remembering specific bits of spells. A Grimoire helped those individuals figure out what kinds of spells they were supposed to use.