Incursions
From Dungeon Defenders 2 Wiki
Incursions are maps that can be played after a Chaos Trials map has been completed. Upon completing a Chaos tier for the first time (Chaos 1-7), one or 2 incursions are unlocked for that Chaos tier. Upon completing the incursion you permanently unlock a special weapon, which can be purchased from the Wayfarer for 500 defender medals.
