If you're going to attempt this, I'm going to assume you've explored all other possibilites...
I want you to keep in mind this is very powerful & will cause great harm.
I discovered this after removing somthing similar from my (now ex) girlfriend. I actually thought it was rather genuis at the time... It's still very powerful & dark.
First of all, you need to create the 'weapon' so to speak. Visualise a spear made out of dark energy. Program it wedge itself into a persons crown chakra & extend ALL the way down into their base chakra & add in aother nasty bits you want it to do.
Now visualise your enemy's energy infront of you & put this massive dark spike into their crown chakra & entend it all the way down to their base chakra. You should then make it 'root' itself into them, by visualing the spike growing roots & firmly putting itself there.
If done correctly you should expect to see the following things --
1) Your enemy should no longer be able to do any sort of high level energy work
2) You should see the other programs you've put into the energy start to work.
If you've done it to human also expect to see these things happen.
1) Your enemy will become very sick & slowly die unless the spike is removed.
2) That person will constantly feel cold.
3) It's likley people will not be able to be around this person because they get a 'bad vibe' from them.
Clean your aura like a crazy beaver after doing this!