The ignorance in this world fills you with rage. You gain the ability to:

• Turn a book into a spellcasting focus you can use. This process takes an hour to complete. Upon completion, the book's cover is magically reinforced and becomes hard enough to wield as a weapon. Weapon attack using this book deals 1d8 bludgeoning damage and uses your strength modifier for the attack and damage rolls.
• You can use your bonus action to ponder upon the text written in the book. This gives you an advantage on Constitution saving throws that you make to maintain your concentration on a spell when you take damage. You can use this feature a number of times equal to your proficiency bonus per long rest.
• You can use this book as a makeshift shield if you're not currently wielding one. This increases your AC by 1.
• Failure to match your skill infuriates you. Upon casting a leveled spell, if the target fails the saving throw or gets hit by a spell attack, you manifest your anger into a stick of chalk which you then throw at the target. The chalk deals 1d6 damage for every spell level spent and uses your strength modifier for the attack and damage rolls. You can only manifest one chalk for every spell cast. If the spell hits multiple enemies, you choose which target to throw the chalk at. If the target dies from the spell effect before you throw the chalk, you can throw it to another target you can see. 

"Zero point, next!"