Ornament of Wizardry

Ring, rarity varies (requires attunement by a wizard)

There are four distinct types of this ring (ring of wizardry I, II, III, and IV), each of which grants you additional spell slots. If you have spell slots of the level listed in the table below for your type of ring, the number of spell slots of that level you have is doubled. The details for each ring type are shown in the following table:

Ring	Benefit	Rarity
I	doubles 1st level spell slots	uncommon
II	doubles 2nd level spell slots	rare
III	doubles 3rd level spell slots	very rare
IV	doubles 4th level spell slots	legendary