Castle War: I Am a Natural Disaster

Countless years ago, the gods used the "Castle War" as a bet, using the fate of the ten races as a bargaining chip. Later, the God War came to an end and the bet was abandoned, but the rule code was still engraved on the bottom of the world - as long as two or more intelligent races produce troops and launch attacks at the same time, they will be forced to enter the "castle war" mode.