The Descent into Avernus, Part 6 Title update for Idle Champions of the Forgotten Realms has 4 achievements.
Call in a favor from Mahadi while trying to help Red Ruth.
Call in a favor from Mahadi while Madcaps relentlessly attack!
Deal with an abyssal mutiny while you travel to the monument to Tiamat.
Deal with an abyssal mutiny with the strongest Champions you have.