To qualify for this cache, you must have previously found 15 caches broken down as follows:
3 caches hidden by the same cacher with a user name starting with B
3 caches hidden by the same cacher with a user name starting with I
3 caches hidden by the same cacher with a user name starting with N
3 caches hidden by the same cacher with a user name starting with G
3 caches hidden by the same cacher with a user name starting with O
The caches can be of any variety except for Events. For proof, you may submit a list, a screenshot or use the Challenge checker below.