Translations:Beginner's Guide/7/en
From BlackTalon Wiki
You may also stumble upon some spell crystals, which are used to improve some of your spells. You can only use 100 of a crystal per tier level, split into 2 categories that you can choose freely, as long as the limit of 100 isn't surpassed. Next tiers requires better stones. You can see more information about this in the Spell Boost page.