Expand is a learnable skill (5 SP) that allows a user to increase their battle power for a time while suffering in losses from force, speed, defense, and recovery. It has a total of 4 levels. In order to master it, one must simply expand themselves 1x and sit around in it for a while, and soon 4x should be unlocked. It is often used to give people boosts so that they can hit the BP requirement for a transformation, i.e. Omega Yasai.