i found a easy way to beat it defend until the giant ball come. and try to keep it there in the air for 9 min when. be careful to take extra turret. when 1 min is left push it has high has you can becuase it get very heavy and try to leave it up as much as you can, dont let it hit you. After that there will only be 30- 20 second left so its a easy win from there. you can get a timer on online timer set it for 10 min so you can keep watch.
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