Quote from yosmo7
alright but what now with the max level of 30 in 1.4
25x25x25 adventure map challenge: http://www.minecraftforum.net/forums/mapping-and-modding/maps/maps-discussion/2285420-challenge-make-a-25x25x25-adventure-map
Quote from MMWong
I think it is the second bar or above. Hope that helps!