Suramar Palace is a raid introduced with World of Warcraft: Legion. It is the home of the Nightborn and contains the Nightwell, the source of their magical power. It is expected to have 10 bosses and will feature the final fight players have with Gul'dan. The Eye of Aman'thul is here.
The Grand Magistrix of the Nightborn resides here, watching over everything within Suramar. One of the corrupted Pillars of Creation is here.
Players work their way through a back entrance, similar to the Black Temple, and then up through the reaches, atop balconies and tunnels, until they square off against leader of the Palace and Gul'dan.
The Nighthold is located in Suramar. This is the palace from which Grand Magistrix Elisande runs the city of Suramar. She has brokered a deal with theBurning Legion to allow them to use a portion of the Nightwell energy.
The largest structure in the Broken Isles, and among the grandest in all of Azeroth, the Nighthold stands as a testament to the achievements of the nightborne civilization. Centered around the Nightwell, the fount of arcane energy that has sustained Suramar for centuries, these grounds were built as a haven from the worries of the world. But as a felstorm churns above the former temple of Elune across the bay, and Gul'dan himself now resides within the palace's walls, those worry now begin, not end, here.