So I was doing this Alkaizer run and I had already found 6 legendary (not from Grim Harvest) and I said I would do the whole Act and see how many I can get.
On the last pack, this happened.
Inna's Helm dropped from Grim harvest and when I killed hte champs the mighty weapon dropped.
Just tried Grim Harvest on my Keyruns yesterday evening, and it is a noticable difference in gold and loot drops. I didn't have the luck to get a legendary via Grim Harvest, but 14 Rares in 1h Act 1 Keyruns (4 runs actually, Cemetary -> Cryptas -> Keywarden -> Scavenger Den -> And again) on MP3. I replaced Overpower - Crushing Advance for Grim Harvest and had no noticable difference in Defense, but more Loot. So yeah, I will now use Grim Harvest over Overpower ;)
Thanks for pointing out this topic.
Grim harvest is pretty nice. I use it when farming xp from mp1. I replaced WotB with it.. nice to also have additional fury generator. Im also using Charge rune on war cry for extra fury so can sprint all the time. I have found maybe 4 legendarys with Grim Harvest and lots of rares.. love it! <3
"Enemies are badly shaken and have a 15% chance to drop additional treasure or health globes."
Treasure can be gold or an item and yes, you don't need to kill them.
It's a 15% chance though so most of the times you get nothing.