Wilderness raids would be a new world event (similar to Kolodion & stars) that take place in wilderness as the name suggests.
This would occur once every 2 hours. These raids would appear in certain castle/fortress alike areas which are Dark Knight's fortress, Bandit camp, Rogue's castle and Lava maze. Only 1 location at a time which is random.
Wilderness raid would consist of ~10 NPCs with similar AI as Thomy NPC. These would be custom NPCs with actual gear from the game, attack you back and be aggresive, eat food.
Their combat level and gear would vary randomly from what level 80s would wear and what would a level 126 player wear.
OR
Combat level and gear of these raid NPCs would depend on the location where the raid appeared. Low level wilderness (Black Knight's fortress, Bandit camp) would have lower level ones while Rogue's castle and Lava maze would have higher level ones with better gear due to their location.
How rewards would work is they would drop wilderness keys (higher level the npc -> higher drop chance of wilderness key) and you would use these keys to a chest to claim your loot.
As for the location and rewards I do not really have anything to suggest. Location however could be along with the raid areas. A new chest would be added to all 4 locations or just 1 chest added to Edgeville you use to claim loot.