A swarm of rats is a mass of rats that attacks together.1 Four fought the party in the sewers beneath Argentum on 25 Coldrise, 1714 PSF, alongside four giant rats.2
History
Session 3
Hazel was swarmed when she investigated a stack of barrels.2 Luma killed one swarm with fourteen conjured arrows, and Hazel called a moonbeam down on three at once.2 Temerity killed the last.2