20 & 30 are the softcaps for attunement slots ; recommended value for using enhancement and/or healing spells (ex: magic barrier, sunlight. Attunement is a stat in Dark Souls II. Attunement determines the number of spell slots the. Attunement is a character attribute in Dark Souls 3 that determines the number of attunement slots or 10 gives you 1 Slot ; 14 gives you 2 Slots ; 18 gives you 3 Slots ; 24 gives you 4 Slots . Level 20 for a third magic slot?!.