Ashava the Pestilent is a World Boss in Diablo 4 that is located in the Crucible. She is a level 25 boss that is capable of dealing a lot of damage, so it is important to be prepared before fighting her.
Ashava has a number of attacks that she can use, including ground pound, pestilence breath, and death's embrace. These attacks can deal a lot of damage, so it is important to avoid them.
Doing this blind as Sorcerer was just plop 2 Hydras and keep a safe distance, a LARGE distance as I died the first time, AOE is huge (Above screen is not far enough for ranged)