Quote Originally Posted by Kraniel View Post
I'd have to ask to OP, what was your iLvl when you were doing this raid ? Did you have any Vulnerability debuff stacks on when you took the damage ? Were you full health ?.
Let me see if I can clear this up.

If you get by the wrong umbral/astral effect with vuln^, it hits you for over 200k damage and causes knockback. Not even a tank will survive it.

If you get by the wrong astral/umbral effect without a vuln^ (this can only happen at the start of the phase), it won't kill you if at near full health, but it still causes the knockback, and can send you off.

When the umbral/astral debuffs are not in effect and you just have to worry about the order of the portals, the attack just hits you for high damage and puts a vuln^ stack on you. Most players will survive this if at full health, and tanks will easily brush it off.

The mechanic is not a true one-shot, but after the boss uses its ultimate and combines both umbral/astral and portal, it's either live or die.