Crystal Cannon is a powerful tower that can support you in the destruction of obstacles and gate defenses, but unfortunately he is not available as not all players are joint towers. That's why it's rare and can be preserved from the market.
During this time, instead of towers with unique attacks, like the advanced levels of League 1, you will need to focus the LN towers on the area or Tesla attack and attack the entire region to eliminate them. Looking at the Crystal Cannon, you can see that there are attacks in this area and can be used three times in combat.
This card has an explosive industry, and is set to fill areas that are greater than faults as explosives. There is a 4.5 fire interval, but slime roads are used in front of this tower to give the fault a good chance to be attacked. Yes, they read a lot about damage, the most important of this tower, which represents physical and magical damage.
This tower has two types of attacks, as it can attack with physical damage ranging from 65 to 105 and magically attacks in the same area, bringing it as a Freron, full of explosions and physical damage. Such a tower choice is very good in the final wave, if there is enough mana, and when the magnificent Fathom appears on the field and they defend themselves well against them, they probably need a strong tower when they have lost some minds and not others.
