There are four weapon classes: the Storm Bow, the Volcanic Hammer, the Spirit Knives, and the Frost Shield; each have the tactical roles of a long range attacker, slow melee attacker, fast melee attacker and a tank respectively. The active and passive abilities available for each class allow some form of customization. The weapon class and selected abilities (which also have cooldowns) can be changed before the start of any arena level. Each player must choose a different weapon class. Balfus can be made to interact with the environment's spiritual plane by ordering him to activate or trigger props like healing pedestals or set off a stunning blast from traps. He can travel with the characters, float in space or can be called to their location. Good positioning and communication will help the players use Balfus efficiently; the need to do this while facing waves of enemies, makes the game more challenging.