The Library

The Library, an unknown being of immense knowledge. Some say it's true form is incomprehensible, usually choosing to appear as a vast library, occupied only by a tall and thin Owlin custodian. 

Expanded Spell List

The Library lets you choose from an expanded list of spells when you learn a warlock spell. The following spells are added to the warlock spell list for you.

Library Expanded Spells

Spell Level	Spells
1st	detect magic, identify
2nd	augury, zone of truth
3rd	glyph of warding, sending
4th	divination, private sanctum
5th	commune, legend lore

Library Book

The Library has gifted you with a book to take on your journeys. Through this book, you maintain a connection to your patron, as well as the knowledge it contains. The book will automatically record information that it detects around it and gives you abilities while it is in your possession.

• You are bonded to your book. You can summon it to yourself as a bonus action if it is on the same plane of existence, causing it to teleport instantly to your hand.
• You can read your book to accurately recall anything you have seen or heard while you have had it in your possession.
• You can perceive through the book, reading it in your mind's eye as it transcribes what is around it. You can use this ability regardless of the book's location. Darkness does not affect the book's perception. 
• You can spend 10 minutes reading about a language if the book has recorded someone speaking it. Make an Intelligence check (DC 15). On a success, you can understand that language until you finish a long rest. 
• While holding the book open in your hand, you gain proficiency in Arcana and History. 

Background Check

At 6th level, you can scan the vast Library through your book, pinpointing a foe’s weaknesses. As a bonus action, you can force a creature you can see to make a Charisma saving throw against your spell save DC. On a failed save, you discern the following attributes of the target: Armour Class, Damage Vulnerabilities, Damage Resistances, Damage Immunities, and Condition Immunities.

Seek Answers

Beginning at 10th level, you are able to call upon The Library’s untold knowledge in times of need. 

As an action, The Library can grant knowledge and power once unknown to you. Describe the assistance you seek, and roll percentile dice. If you roll a number equal to or lower than your Warlock level, The Library grants you this assistance. The DM chooses the nature of the intervention; the effect of any Warlock spell would be appropriate, or access to knowledge that was once unknown to the player.

If The Library intervenes, you can’t use this feature again for 7 days. Otherwise, you can use it again after you finish a long rest.

Knowledge is Power

At 14th level, you are granted an overwhelming surge of knowledge and power, able to access The Library in full. You gain the following benefits:

• You learn a language of your choice.
• You gain proficiency in a skill of your choice.
• You gain proficiency in a saving throw of your choice.
• You gain resistance to one type of damage of your choice.

When you finish a long rest, you can change any of the chosen attributes.