~Use a Karmic Streak attack to defeat exactly one enemy~

Explaination: All powers have a karmic streak attack, except for concrete. Now, you need to fill your karma meter up in order to use a karmic streak move. You do this by getting 7 instances of the same karma. For example, say I incapacitated (Good Karma) 7 enemies using the neon power by shooting enemies in the feet, this will reward me with the karmic ability to use. But say in those kills, I performed a bad karma move by shooting an enemy in the head, it would reset the meter and I would need to get 7 kills again. This may sound confusing, but it's actually pretty easy to do and you'll be given these karmic streak moves to use without even trying half the time.

Once you have your move, you want to fly around the rooftops and look for enemies. Usually they are in groups of 3. What you want to do is kill 2 of them using normal means, so only one is left. Then, press DOWN on the D-PAD to use the karmic streak move. The best move to use for this would be the orbital strike one, which is linked to the smoke power. This will send you flying up into the air, then crashing back down. If you only kill one enemy with the move, the trophy will unlock.