bug dungeon castle dark fang

[raizhor]

Hello, we were in the Darkfang Castle dungeon on Normal difficulty trying to get the achievements, and suddenly the boss "Lord Walden" used an ability that appears at level 85 on Heroic difficulty. This is clearly a bug, and it's not your fault. It would be a great help if you could revive us, as it's obviously a mistake and your fault, since it's preventing us from progressing to get the achievements in the Extreme difficulty dungeons. I'm sending you the screenshots below.

[raizhor]

As you can see in the screenshots, it's a bug. Thanks, and it would be great if you could revive us.

 

[raizhor]

And here you can see the skill that killed us