Spawns on the first floor of the Tower of Frozen Shadows. He is a chain spawn from a random 1st floor mob. Drops the key to the second floor. Average spawn is about 2-3 clearing of the first floor, so 1/40 or so.
While hunting for keys, I noticed that every trash mob that spawned a key mob had the "a rare creature" tag in its con message, as did the resulting key mob (worked on floors 1, 2 and 3). I'm guessing this trick only works on the key mobs that spawn from random trash, but I haven't gotten high enough in the tower to verify anything else. If looking for key mobs on floors 1-3, you may wanna give the floor a once-over to see if any of the trash mobs con as rare before clearing, might save a little time. :D
This seems to be a good tip- I got this spawn from a shadowbone with the rare tag. Of note, it was also the first one that conned as level 29 to me as well.
[Wed Aug 19 15:26:29 2015] Your faction standing with Tserrina SylTor has been adjusted by -10. [Wed Aug 19 15:26:29 2015] You pierce a large undead gnoll for 161 points of damage. [Wed Aug 19 15:26:29 2015] You have slain a large undead gnoll!
I didnt realize that 3!!!! different things come out. ALL were RED to me. We had a group of a 29 Enchanter, 28 Rogue, 24 Wizzard, 28 Cleric merc, and 24 Warrior merc. We all ran out of mana and came close to dieing. BE CAREFUL!!
I don't know if it was coincidence or not, but be aware that he may pop right on top of you! I was taking down a shadowbone near the entrance, and when it went down, this guy popped right at that spot. He will do some damage if you're not prepared and low on health.
That was no coincidence he spawned on top of you. If you keep killing the "a shadow beast" you will eventually kill the PH for it, in which he spawns in his place as soon you kill him. I just kept turning right from entrance and another immediate right down those halls and pulling them from there. It can take a long time or a short time, the ph is random. But when you get impatient, always remember ......"EVER" quest (smile). Many times you will see a named beast spawn. If you notice he hasn't spawned in reasonable time, the PH is close by. (smirk) Took me 4 hours to get him to spawn this last time. (no smile).
dont know how I did it but was in the 2nd room on the left has u go in 3 skeletons poped up and started killing them and when 1 was left he poped up almost got me killed.