Unique: Deals 15% of target champion's maximum health in magic damage and applies the debuff, Doom. Doom amplifies all magic damage that champion takes by 20% for 4 seconds. 90 second cooldown (750 range).
It is best used to initiate fights, as it amplifies all subsequent magic damage the target takes. It is worth stressing that that the damage amplifier will increase magic damage dealt from all sources, not just the holder of Deathfire Grasp.
Deathfire Grasp is a great choice on burst mages who have the potential to kill enemies in a single spell combo, such as Veigar and LeBlanc.
Deathfire Grasp is a better option when more than one member of a team deals primarily magic damage, such as an AP support.
When Deathfire Grasp was originally added, it was far too powerful on certain champions and was removed and reworked into its current iteration.
Its previous behavior has now been reinstated and slightly modified into Liandry's Torment.
In the V188.8.131.52 patch, the item was reimplemented with a new functionality.
NEW Active: Deals 15% of target champion's maximum health in magic damage (down from 15% of target's current health + 5% per 100 AP ), then amplifies all magic damage they take by 20% for 4 seconds. 60 second cooldown.