Prerequisite: Swarm subclass, Warlock level 6

Your swarm attack can deal radiant damage rather than piercing, and on a hit the target is outlined in light until the start of your next turn. Creatures outlined in this manner cannot benefit from being invisible.

Additionally, when you use Disperse, you can choose for your swarm to emit 5 feet of bright light and 5 additional feet of dim light for the duration.