Use Magic Device
Attune to four magic items instead of three, roll 1d6 on charged-item use (6 negates charge cost), and cast spell scrolls using Intelligence (DC 10 + spell level for 2nd-level+; ca...
You've learned how to maximize use of magic items, granting you the following benefits.
Attunement. You can attune to up to four magic items at once.
Charges. Whenever you use a magic item property that expends charges, roll 1d6. On a roll of 6, you use the property without expending the charges.
Scrolls. You can use any Spell Scroll, using Intelligence as your spellcasting ability for the spell. If the spell is a cantrip or a level 1 spell, you can cast it reliably. If the scroll contains a higher-level spell, you must first succeed on an Intelligence (Arcana) check (DC 10 plus the spell's level). On a successful check, you cast the spell from the scroll. On a failed check, the scroll disintegrates.