Overall, its not bad. The hills around the outside were made well, and the trees look good. The overall impression I get from the map, however, is that it seems empty. Its just a flat area with some trees and a river. There could have easily been a few rocks or bushes around the edges that would have added detail without getting in the way of pvp. Another thing to keep in mind is when players are battling in blackmamba, they can easily get on top of the glass above the map or in the trees, and if they are in 1.9+ could get stuck on the single panes. Its a great start, but with the number of Duel arenas we already have, I would really like to see a bit more in this arena