Talk:Abyssal Mask/@comment-15675781-20181019234258/@comment-33359150-20190302075411

isn't it multiplicative?

It doesn't say damage is increased by 15%

it says enemies take 15% MORE magic damage.

More implies that it's multiplicative with other modifiers such as magic penetration

If it was just another 15% magic penetration, the item would be garbo, but i dont' think that's how it works.

This also means it's multiplicative with anything that gives you increased damage. meaning it's a seperate modifier entirely.

If it was just another item with 15% increased damage, it wouldn't be nearly as good because of all the sources of % increased damage you can get elsewhere.

As far as I know, this is the only source of % MORE damage in the game and acts as an entirely unique modifier unto itself.

being % more damage is the only way it could ever be a viable item without having the AP it had previous to its rework.

Downside of this is that it become an incredibly niche item that could only ever be useful on a very limited set of champions.