I like the Ongr random event, keeps you on your toes. When he spawns next to your capital, though...
https://www.dropbox.com/s/xmqfqdinbv9514r/Unfair_random_event.jpg
Very unfair for early in the game. I think this is still before turn 50. My armies MIGHT be able to take him, but my sov is across the map with his main army. If Ongr attacks on his first move, my capital is toast.
I have never seen this happen before, probably a one-off, but here's the save if you want to examine:
https://www.dropbox.com/s/j5q57g2380loo0q/Unfair%20Random%20Event.EleSav