Staff of the Magi
Staff, legendary, requires attunement by a sorcerer, warlock, or wizard · 2014 rules, SRD 5.1
+2 quarterstaff; advantage on saves vs spells; +2 spell attacks; 50 charges: many spells (fireball, lightning bolt, wall of fire, passwall, plane shift, telekinesis...); spell absorption; retributive strike.
Also in the 2024 rules (SRD 5.2).