spell slots when multiclassing - Dungeons & Dragons 5e: Best Magic Items For Sorcerers b888 slot

Expert divination: When you use a level 2 or above divination spell, you regain a spell slot of a spell lower than that level.

However, even if you get access to a 9th level spell slot, multiclassing won't necessarily give you access to a 9th level spell.

You regain all expended spell slots when you finish a long rest. For example, if you know the 1st-level spell Cure Wounds and have a 1st-level and a 2nd-level spell slot available, you can cast Cure Wounds using either slot.