I have decided to release the Revenants as an addition to the Wilderness Hotspots update.
You can find them slaying npcs at the current hot-spot, they are harmless until you do damage to it and if you happen to make damage to him, he will remember that for the next 5 minutes or until he's dead. Once you've been targeted by Revenant, other npcs will not attack you as long as you are in hotspot area, if you don't attack revenant for 5 minutes in anyway or revenant dies, other npcs will become aggressive again.
You must be in a party before you can attack them!
They are very tough and you will need good gear and several friends in your party before you can defeat him and when you do, you are rewarded with loot from 5 different loot tables at same time.
Loot tables [Updated]:
1. Runes and coins, guaranteed drops of each, only the amounts change.
2. Amulet drop table, Most items are in noted form
3. Gear, from rune to dragon medium. Most items are in noted form
4. Gear, from rune to dragon medium. Most items are in noted form
5. Food and potions. Most items are in noted form
Notice: Paralyze Monster won't block his hits completely, but it will take 50 percent off from his damage.
I will not tell you how his behavior works but it's pretty close to how overpowered regular player would play.