# Spellbook When a hero reaches level 3, he or she is rewarded with a personal spellbook in which he can write down up to a maximum of 8 known spells. A hero can only learn generic spells and spells from his own class. This means that, for example, a paladin can only know generic spells and paladin spells. You can delete and write spells into your book at any time from the Spellbook interface. Make sure you choose which ones you write carefully, as they cannot be exchanged for other spells while you are playing a game. Also remember that each spell, like demonic abilities, can only be cast at most once per round. Once you get your spellbook, you start with 3 generic level 0 spells called Cantrips. These spells are the least powerful in the game, but they have the distinction of not requiring mana to cast. As your hero levels up, you'll get more and more powerful spells, which you can use to perform strong synergies. You will also be able to obtain new spells with your fragments in the future by opening card packs or purchasing them from other players on the market. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.dantegames.com/hellmaster/cards/spells/spellbook.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.