The jailer's true goal has never really been to escape the maw or to gain power. He's been focused on reaching this place called the Sepulcher, to go into this place of power and really rewrite the rules of the universe. We'll learn that the jailer has breached the Sepulcher of the first ones, and this becomes our new raid for eternity's end.
We're going to gather our forces and pursue the jailer inside. Once you go inside the Sepulcher, there are some mind blowing visuals. this is a place that should not be able to exist according to the laws of phsyics that we know them on azeroth. Just looking out onto this impossible sky, seeing these ancient works of the first ones, those laws don't apply to anything we see here
Among the bosses we're going to face include the jailer's forces, maybe a Dreadlord or two you haven't tied up loose ends with.
NEW RAID: SEPULCHER OF THE FIRST ONES
Deep in the Sepulcher of the First Ones lies the key to unlock the Jailer's plans. Gather the power of the First Ones as you pursue Zovaal into the Sepulcher and fight through his forces—but first, you must face Anduin, and discover a way to resist the Jailer's terrifying Domination magic.
CONFRONT ANDUIN AND THE JAILER IN THE SEPULCHER OF THE FIRST ONES - Breach the vault containing the Progenitors’ most ancient and powerful creations. Face off against Anduin in a desperate attempt to free him from Domination, and put a definitive end to the Jailer’s plan in the expansion’s climactic 11-boss raid.