The battle cave arena set is amazing! It comes with two figurines, two battle caves, as well as the battle arena walls. The walls have two parts, giving it a strong, secure look and they clip together easily. They connect to the other wall peices (or sides of the battle caves) and can be easily moved and taken apart to make a smaller or larger arena. Each battle cave set has its own unique features, the shadow two headed wolf set includes a crystal trap which activates when touched, a netting roof and “hiding spots” (as my son describes it), to store a purple crystal under the cave. My son loves the wolves purple crystal tail and rock like armour. The lava bull cave includes two nets, a battle ball, ball drop and a crystal which is a larger shape than the others. We love that the walls can open and close so easily. Gifted by MiniZoo