Progression

For group progression there are six single group trials in the Muramite Proving Grounds. Each of the trials gives an aa which raises your max resist level by 8. If you get all six completed you gain a bonus 2 raising your resist cap a total of 50.

For raid progression the target is access to Anguish . For this you'll need to complete two tasks. The first is the Anquish Signets quest in Riftseekers' Sanctum. This is required by everybody that enters, you can't even be /raided in without this being complete. The second is to complete all 6 Raid Trials in Muramite Proving Grounds. Each trial gives a piece of the seal and completing the sixth grants the full seal. If you get /raided in you can loot a Seal: Mastery of All from any boss which will count as completing all the trials.