The new Manaforge: Omega Season 3 raid brings with it the larges boss WoW has ever seen. Dimensius is almost the size of Stormwind, but that’s not all. He also drops a pretty amazing mount!
Eater of Stars
The 
Unbound Star-Eater drops from the final boss of the patch 11.2 raid on Mythic difficulty, so it’s going to be a pretty rare occurrence for quite a long time. It shares its master’s black hole chest and sucks in matter around it in an awesome effect.
It’s also heavily void-themed, obviously, with its tail being particularly dark.
The dragon-like creature will make quite the mount, if you can manage to take down Dimensius the All-Devouring on the highest raid difficulty! For those of us that can’t quite swing that, the mount will become a very low percentage drop from all difficulties after patch 11.2 ends. So there’s hope for everyone!