You have learned to regain some of your magical energy by studying your spellbook.
Once per day when you finish a short rest, you can choose expended spell slots to recover.
The spell slots can have a combined level that is equal to or less than half your wizard level (rounded up), and none of the slots can be 6th level or higher.
For example, if you’re a 4th-level wizard, you can recover up to two levels worth of spell slots. You can recover either a 2nd-level spell slot or two 1st-level spell slots.
Also at 2nd level, your pursuit of osteomancy has
required many hours studying the anatomy of a
myriad of creatures.
You gain proficiency in Medicine checks, and when you make a Medicine check, you gain a bonus to the check equal to your Intelligence modifier.
In addition, when this check concerns a creature that possesses a skeleton, you add double your proficiency bonus to the check, instead of your normal proficiency bonus.
Starting at 2nd level, you learn the basics of
osteomancy, using it for protection.
As a bonus action, if you're not wearing armor or wielding a shield, you can force a frame of bones out of your body to protect you.
This grants you temporary hit points equal to 2 times your level in this class.
This armor lasts for one minute, or until you lose the temporary hit points.
While you have these temporary hit points, you gain resistance to slashing and piercing damage, and you gain a bonus to AC equal to one-third your level in this class (rounded down, minimum of 1).
Once you've used this feature, you can't use it again until you finish a short or long rest.