Memory is a Diablo 2 Resurrected runeword created by combining lum + io + sol + eth into a 4 socket staff. It requires at least level 37 to equip.
Staves can have up to 3 staff modifiers specific to Sorceress spells ranging between +1 and +3 to skill level. Therefore, you should look for a 3 socket staff with at least some +skills that your build uses.An easy way to quickly find a good staves is to shop with Drognan in act 2. You can reset his shop by exiting and re-entering town.