Brilliant spar tasks can be completed infinitely every day, while mysterious spar tasks can only be completed three times a day. Bombers can also buy mysterious spar directly in small quantities, but they can only buy three at most every day.
When the mysterious spar and brilliant spar have accumulated enough, the bomb friends can click on the exchange task to exchange the weapons they want. If you are diligent and serious enough, it is not difficult to collect all three advanced weapons: minotaur, love boomerang and ancient bamboo gun.