***Must have Summon Gargoyle and Shadow of Death talents***
Discovered this today when I summoned my Gargoyle to help me fight an elite.
What happened was it flew down, and I died a few seconds later. I ressed as a ghoul and finished off the elite with about 40 seconds left on my ghoul form. This is when I noticed my Gargoyle hadn't flown away.
If you summon your Gargoyle right before you die, it will still fight for you until you eventually run out of time on your ghoul form and die completely. You don't have runic power to keep the gargoyle there, yet it stays.
This is useful for quests that you need to kill a tough elite, because once you die, you can just run around and let your gargoyle wear it down hopefully enough to kill it. Also nice for anytime you're about to die in any situation, as you can pull 3-4 mobs with your ghoul and continue killing with the gargoyle until you have to run back to your corpse.
But this is especially nice in PvP. Was able to 1v3 3 horde my level just by huddling and letting my gargoyle finish them off. Think of the possibilities in Arena if you can maintain ~1000 DPS between yourself and the Gargoyle even after death.
Will provide screenshots/video if requested, but this is pretty simple to understand and reproduce, just go out and try it! =)
Also working on manipulating this exploit with the instant ressing exploit with the ghoul form to see if I can trick the gargoyle to stay even after I'm back in Death Knight form, or producing multiple Gargoyles.
Video:
[ame="http://www.youtube.com/watch?v=Yr_qnOJK854"]YouTube - Death Knight Gargoyle Exploit[/ame]