Furthermore, you can cast any wizard spell with the ritual tag without expending a spell slot. Once you do so, you can't do so again until you finish a long rest.

Beginning at 6th level, you become more capable at quickly performing spells as rituals, and can use a fraction of their magic to restore your casting capabilities. Casting any wizard as a ritual spell only takes you an additional minute, rather than ten minutes.

Starting at 10th level, you have attained a greater mastery of spell preparation. As a bonus action, you can replace one spell you have prepared with another spell from your spellbook. You can't use this feature again until you finish a short or long rest.

Lore Master's Library

At 14th level, you can create an alternate realm to store your knowledge. You can cast demiplane, without requiring material components. After you cast the spell with this feature, you can't do so again until you finish a long rest.

When you cast demiplane this way, you create an expansive library of which to store all your findings. You can spend 1 minute preforming a ritual with a non-magical book, piece of parchment, scroll, or other item that information is stored in or written on. After the ritual is complete, a copy of that object is stored inside of the demiplane. While inside your demiplane, you know all of its contents, and the exact location of each one.

This demiplane adjusts itself to always be large enough to fit all the objects inside of it, and if an object is removed from the demiplane, it immediatly vanishes, returning to its spot in the demiplane.