Grievous Wounds option for AP champions

costs 2900 and gives the unique passive "Dealing magic damage to an enemy champion below 35% health inflicts Grievous Wounds to them for 8 seconds." while costs 800 and gives the unique passive "Physical damage inflicts Grievous Wounds on enemy champions for 3 seconds.". So lets take a look at these items based on their Grievous Wounds options side by side.

----------------------------------------------------------------------------------------------- ---------------------------------------------Cost: -----------2900----------------------------800 ----Grievous Wounds duration: ----------8 seconds-------------------3 seconds Grievous Wounds Stipulation: ---------Below 35% HP------------None

It would be great if the in was a 800 gold Grievous Wounds item called "monograph of decay" or something and then the combine cost of could be lowered by 365 gold. It really sucks if your playing an AP champion who does not use mana or a mage who does not want but it is really your only option for Grievous Wounds.