To help defend against dragon raids, there should be a defense called "black arrow." The black arrow is so strong, it will kill the dragon with a single hit. This defense should be updated similar to air defense; level 1-one arrow th8. Level 2 - 2 arrows, th8 maxed. level 3-3 arrows, th9+ maxed. It do not keep shooting like the air defense does. For example, level one black arrow has one arrow. If you raid with 9 dragons, one will die first hit leaving you with 8. It shoots that one arrow and that's it. No more arrows until upgrade.

