There is a guy in lavastorm in teh lava with no name (I call him no name) and one time recently I did a bug that multiplies your pet. I had 8 pets up and fought him. He hit for 140 and took about 5-10 min. for him to go down. tough guy lol. No loot and very little exp.
There are mobs in some zones that have no name and are invis. They can be tracked and with a little creative targeting, they can be targeted. There is at least one in Lavastorm and he usually hangs out in a lava pool. This is not the same guy for the monk epic. These guys have been around for much longer than epics. There are several post about these guys (not the Invisman in SS). There has been speculation on the purpose of these mobs, mainly the belief is that they are the "pain and suffering" mobs. I know it sounds crazy, but search past post for Pain and suffering or very odd creatures. If you want to take a "look" at the invisable mob in lava storm, the easyest way is to get a tracker. When they are tracking, they will see a list of mobs in range. The nameless mob will be a blank, or space in the tracking list. When targeted, it is just a red hp bar in the target window. Other places I've seen this regularly is in Qyenos by the fountain at the cleric guild and in the northern part of the Eastern waste. As for skyshrine, I haven't seen this occurance of a the no named mob there, so I can't say for sure if it's the same thing.
i was told once not to pull corpses in PoG (plaine of growth) cuzz mob's algro you maybee.....the invisible man is there too...........scarey (plays thriller music)