This arena first appeared in Monster Hunter Tri. Unlike previous arenas, this one includes a Dragonator, although it can only be used in special online event Quests, like Dual Diablos or the Dual Deviljho event. In the middle of the arena, there is a gathering spot where you can find 2 Lifepowders. There are also 3 more gathering spots around the arena's edge. One contains 2 EZ Flash Bombs and the other two contain 2 Mega Potions each.
This area is also the main setting for Co-Op Challenges (2 players) and some Event Quests (4 players).