Right at the start of a battle, MetaElf takes action based on speed. The faster a MetaElf is, the greater power of action it has. The maximum action value is 100. After a MetaElf finishes its action, the action value goes down to 0. Moving on to the next round, all MetaElves’ action values start increasing. One can take action once its action value reaches 100. If various MetaElves’ values reach 100 at the same time, the one with the highest speed starts its action first. On the battlefield, when there is no MetaElf's action value > = 100, it is a Bye-Round where b) Formula(as below) machanisim is implemented, which is to make sure in each round there is at least one MetaElf being able to take action with its action value > = 100.