Hey, sorry if this is a repost, I did some research but coulnd't find anything atleast :S
Instructions on how to kill your priest friend:
1. He must have holy specc with the spirit healer talent which turns him/her into a spirit healer upon dieing.
2. Start the duel, and fight your friend until he has 1HP, here he enters the Spirit Healer mode
3. When the priest got transformed into spirit healer type the /yield command to surrender the duel, the priest still remains in Spirit Healer state even after you surrender, and when the Spirit Healer-buff now times out, the priest dies!
4. Have fun killing your friendD
Thanks,
Me