Forum:Dark room of nightmare

Card Effect: Each time damage, except Battle Damage, is inflicted to your opponent's Life Points, inflict 300 points of damage to your opponent's Life Points. This card's effect is not applied to the effect of "Dark Room of Nightmare".

So heres the question, if persay i use ookazi (800 effect damage) and i have two "Dark Room of Nightmare" on the field, would my opponent take 800 for ookazi plus 300 for each dark room of nightmare, or just 800 plus 300?

I beleive the "This card's effect is not applied to the effect of "Dark Room of Nightmare" is so that in doesnt create and infinate loop.