Staff of Swarming Insects
Staff, rare, requires attunement by a bard, cleric, druid, sorcerer, warlock, or wizard · 2014 rules, SRD 5.1
10 charges (regain 1d6+4): giant insect, insect plague, or an insect cloud (30-ft radius, heavily obscured).
Also in the 2024 rules (SRD 5.2).