Legend

Legend is the last known rank on the LEGO Message Boards. You reach the rank at 24,064 posts, and then the rank either lasts forever, or the next rank comes at 48,128 posts. It was previously called Rank X because when Rock-o-Ages first achieved it the rank picture was the "picture error" X. So far, only four users have reached this rank. In order of achievement: Rock-o-Ages, Dude777477, Genralaustin and Alemas. JohnnyNeutron is currently the closest user to reach this rank.

The previous rank is Maniac

Funfacts
It seemed when Legend came out the the rank was huge. Bigger than all the other ranks but them a few days later it appeared to have shrunk and has been that way ever since.