S214 Mana Void
S213 Watch Tower 
Blade of Queen has a reputation system which is different from other games. Apart from getting rewards by increasing reputation level, players can recruit partners after upgrading the reputation. The higher your reputation is, the more partners you can recruit.
About Partner Recruitment
Partners’ classification
Reputation and Partners’ Recruitment
The higher reputation player has, the more partners they can recruit. Many strong partners can be recruited only when players have a high reputation.