User blog comment:Emptylord/Season 3 - PBE Patch Notes/@comment-2179912-20121118030152/@comment-4881935-20121118031001

100% sure.

Deathfire's Grasp - Remade Grants large amounts of AP and CDR%.
 * Now builds out of Needlessly Large Rod and an Amplifying Tome.\
 * Unique Active: Deals 15% of the target's maximum health and amplifies magic damage done to the target by 20% for 4 seconds.