I going to propose new function in guild : Guild Quests!
Next to the guild building on the main screen, you can place the building of quests. There are three types of quests: easy, medium and hard. Each is given a specific time of 10, 20, 30 hours, respectively. For each quests, the guild receives influence as a reward, and the player receives other prizes (coins, diamonds, disk power, stamina, diamond crates, etc.)
For example: an easy quest - To spend 100 stamina (for 10 hours). The award is 5000 influence, 50k gold, 3 diamond chest.
At the same time 10 free quests of each difficult can be stored. Players can book quests. A player can also join a quest along with a friend to help him. The helper receives the award only if he has completed at least 10% of the assignment.
What do you think about it?)) I will glad to see your propositions and questions))