[Question} Dual Blade Skill [ Asura Anger]

Asura is not like Sarcosanctity, it doesn't ignore any damage at all.

The Dragonic Katara affect does work on bosses, but only of the Devil type. I don't know exactly which monsters are Devil type, but none of the Chaos Root Abyss bosses are.

For reasons that I never understood, Asura does actually ignore the damage from Arkarium's screen crack OHKO attack:

[video=youtube_share;-NSVx-Sgsmw]http://youtu.be/-NSVx-Sgsmw[/video]

There may be other attacks that it ignores damage from too but I can't think of any immediately. It's certainly not a normal part of the attack and as far as I'm aware it doesn't work on Gollux' screen crack OHKO type attacks.