2 barbarian will be pushing a machine and when they are in range (it will be long range troop) they will load stone in the catapult and they will blast , it will go and hit the defense building (fav building will be defence building)
Level ------------hp-----------damage per sec
1--------------------320-------------300
2--------------------390--------------410
3---------------------450-------------500
(It will be till level 3 [maybe more level may come] )