Cheque drops or mibolerone, which is the active ingredient found in the veterinary steroid Cheque Drops (7 alpha, 17 alpha-dimethyl 19-nortestosterone) are very difficult to find... be careful not to get scammed. However, if you do find them, your friend will be very happy with them - they have an extremely fast clearance time (on the order of hours) and so many athletes who are drug tested have used them a day or so before events requiring testing and have passed the tests. They are very potent with regard to generating aggression and getting you ready to kick ass.
However, if you can't get them then I like the suggestion of using Halo - and I would add Trenbolone to it. Halo+Tren and you will be one aggressive mofo.
DrG