Duskblade and Deathfire Grasp
Deathfire Grasp:
- 3100 Gold
- 120 AP
- 10% CDR
- Deals 15% of target champion's maximum health in magic damage, then amplifies all magic damage they take by 20% for 4 seconds. 60 second cooldown.
Duskblade: 
- 2900 Gold
- 55 AD
- 10%CDR
- After being unseen for at least 1 second, your next basic attack against an enemy champion will have enhanced effects. The enhanced attack lasts 5 seconds after being seen by an enemy champion. Melee role Melee champions will deal 320 (max level) bonus on-hit physical damage and Slow icon slows by 99% for 0.25 seconds. (I left out Ranged because most Duskblade users are melee)
- When spotted by an enemy ward or Noxious Trap traps, gain Blackout over a 400-unit radius for 8 seconds (90 second cooldown).
I make the comparison between the two because I believe that Duskblade is at least in need of some changes, if not a complete removal like DFG.
In my eyes these two items are extremely similar. Their bonus effects are used in the same way. Create a situation where the target has no chance of fighting back, unless they are a tank building specific resistances. A tank may be able to fight back or even escape (with all the tank items needing some changes, but that is for another time). For most champions though there is/was very little counterplay, especially if the item was rushed. Duskblade allows for high burst damage when utilizing stealthy attacks and also offers help in vision control to allow stealthy attacks. I do realize that CC is the easiest way to shut down Duskblade users, which is much easier late game when teams are together. Champions with no, or a single, form of CC during laning phase and the early game are extremely susceptible to Duskblade abusers. This creates an easy to seize snowball opportunity. Too many Champions are able to abuse Duskblade; It is being build on any champion that can benefit from burst. Some Champions are even able to proc its bonus effect multiple times rapidly:

Duskblade needs change. It is too efficient. It is too powerful. It is too safe. It is overused.
