_NPCScan is an addon for finding super rares. As you’re flying around the world your internal cache automatically updates with a list of all of the mobs you toon can “see”. When your cache “sees” a rare mob, NPCScan notices and sounds the alarm. It plays a distinctive sound and show a clickable picture of the rare at the bottom of your screen. Clicking on the Rare’s nameplate causes you to target that Rare.
While flying around in Icecrown on Sunday NPCScan went off and told me it had spotted Putridus the Ancient. I clicked on the name plate and then spun my camera around for a few minutes looking for the mob. It took about a minute, but I finally located him. Two of my guildies came and helped me to down him. I’ve now gotten 3 of the extremely rare mobs for the Frostbitten achievment. Oddly, you can also spot Putridus while sitting in Dalaran He pats that close to the city.
While looking up info on NPCScan for this post I stumbled across NPCScan Overlay. This is a helper addon to NPCScan that draws overlays on your maps to help you find the super rare spawns. I haven’t installed it yet, but I will this evening.
After you’ve spotted a rare, if you want to be able to spot it again you’ll need to be sure to clear your creature cache. The addon page on Curse.com has good instructions about how to do that.
This addon is perfect if you’re looking to complete the super rare’s achievements.. or if you’re a hunter looking for that rare pet.. or if you want that lovely drop (Time Lost Protodrake)