[HexGirlBestGirl]

I see. That would make sense if that were the case. It is also possible that I took the words 'non-resistable' in a quite literal sense due to how it was worded in the description of the skill.

non-resistable and non-absorbable fire damage. So I had thought that it meant "Fire resistance and fire absorption will not work for reducing or mitigating this form of fire damage."