The guild box is another useful feature of a guild. You can
collect its reward each time your guild reaches the required
number of keys to open it. Each time you open a guild box after
receiving it, you contribute 500 exp towards its level.
The higher the guild box level, the more chance of getting a higher
level guild box.
Each time you reach the required number of keys for the guild box,
a new one will appear randomly.
To gain keys to contribute towards opening the guild box, simply open
as many guild gifts as you can daily as these give 1-2000 keys per gift
depending on the type of gift you open.
Each member opening their gifts contributes towards opening the guild
box.