Blood Brothers 2is DeNA's follow-up to their popular strategy RPG of the same name (minus the "2"), and it's just been updated with a bunch of new stuff. New stuff like player guilds and special daily events.
Guilds let players team-up for all sorts of benefits. Along with in-game chat to help members communicate, mastery levels can be pooled and shared with all guildies, any in-app purchases made by a guild member will bestow gifts to every other guild member, and newcomers can begin to enjoy the shared upgrades as soon as they join.
The new special events, on the other hand, include things like daily bonus stages that give players the chance to earn rare items, specially-themed daily packs for everyone to purchse, and treasure boxes containing random rewards will drop whenever players complete a stage.
All of these features are live right now, and you can grab Blood Brothers 2 off the App Store for free to check them out.