Oblivion Orb

Increases magic damage

30 Ability Power
Cursed: Dealing magic damage applies 40% Grievous Wounds to champions for 3 seconds.

Grievous Wounds reduces the effectiveness of Healing and Regeneration effects.
Builds From

Amplifying Tome Slightly increases Ability Power 435
Builds Into

Chemtech Putrifier 550 Morellonomicon Increases magic damage 450