Talk:Aura/@comment-171.98.156.30-20120803233705/@comment-5266525-20120816101505

You should learn the difference betwen magic penetration and magic resistance reduction.

Abyssal Scepter's aura grants a debuff to enemies, not a buff to allies. As such, their auras can only ever apply once as you cannot be carrying to item to be affected. So it is only ever -20 MR.