In the Secret Base, users can only send to battle up to 3 Heroes, the remaining positions of the ally will have to choose from the existing Bots, these Bots have the same level as users’ level, The special thing is that these available Bots do not have the Spear army. The maximum number of Bots users can choose each turn is 8. Users who open more positions in the main ally will also gain additional positions in the Secret Base, the maximum number of Heroes sent to battle is 8.