More Bloodsworn enemies can be summoned at this point, stay away from Bloodsworn Oppressors and defeat the spawned enemies quickly, the Oppressors can knock you back into the red line or to the blood bats roaming around the room. The Countess will also fly back to the sky and land immediately in the center of the room, a swarm of blood bats will then emerge that shoots outwards throughout the room. The red line will stay on the ground until The Countess is defeated. She also has a move where she'll cast a red line on the ground, standing on this line will cause continuous damage until you move away from it, the best way to avoid this is to never stand in the direction where The Countess is facing as she can instantly cast this red line from time to time.

At this phase, watch out for a red circle on the ground, this indicates where The Countess will land and slam on the ground causing AoE damage. Once you've managed to take away her first health bar, she will disappear and summon Bloodsworn enemies in the area to help fight alongside her. Move away from the area as she will slash that area causing heavy AoE damage. She has an attack where she lifts up her sword with two hands and charges it, and a red wide cone will be marked on the ground indicating the the direction where she'll swing the sword. The strategy here is one person should be the aggro and the rest of the players should be attacking her from behind or from a distance.

She will attack the first player to aggro her. Once you've completed the previous objectives and enter the throne room, The Countess will spawn in the center.

Item find barbarian countess diablo 2