k, here's some detailed information about this NM
first of all, to kill the place holders the location is at E-8 w/ black smoke that does occasionally fade away, but in the small room there's nothing in the room but a rock by the black smoke.
k, here's how you pop the nm, now ppl say its a 21-24 hour lottery, i know for a fact that's false information. to pop this NM, you gotta kill the PLaces holders at E-8 in a small room where nothing is in it by black smoke that occasionally fades away. kill the place holders til they dont appear anymore, respawn for palce holders are 5 mins, once they dont appear anymore after 5 my suggestion is to stay for 2-3 extra minutes just to be sure. once the place holders stop respawning, you need to go out of that room and rest on the cracks just outside of that room around E-8 area to E-9. once you kill the NM or wipe and nm despawns you need to wait about 1hour before you start killing the place holders again