Amulet from Evermeet

Forged for enlightened apprentices in Evermeet, this chaotic, shimmering amulet pulses with anxious arcane energy.

At dawn each day, roll a d8 to determine your school of arcane focus:
1 - Abjuration
2 - Conjuration
3 - Divination
4 - Enchantment
5 - Evocation
6 - Illusion
7 - Necromancy
8 - Transmutation

For the rest of the day, spells from the determined school are cast as if using a spell slot 1 level higher (without expending a higher-level spell slot).
This effect does not allow you to cast spells at a level you could not otherwise cast.
This bonus does not stack with other effects that alter slot level.