insufficient attunement slots: Dark Souls 3: What do the stats and attributes do? EXPLAINED! ... . D&D 5E - Thoughts Regarding the Number of Attuned Items | EN World ... . Attunement Slots - Darksouls3 - darksouls3.wikidot.com.
Attunement Slots Fire attack The level of fire damage inflicted. Casting Speed Speed at which spells can be cast. Lightning attack The level of lightning damage inflicted.
If you're a spellblade type, and you want to go Sword-Focus, that leaves you with two of your attunement
slots consumed just with your hands.
Selecting a new starting Attunement, you haven't unlocked yet on another
slot will permanently unlock the Attunement across all your slots.