Fight!

Some people are doing a snowball fight. Someone's got a snowball launcher. There are people with machine guns modified for shooting snowballs. Then someone comes with a tank that shoots colossal snowballs. But most of the people are only armed with snowballs. Suddenly a monster comes from the himalayas and has snowball powers. When he comes too the town where all the people are he summons a snowball and downs a innocent person. The people fight back. The battle rages for a long time but it looks like the monster is going to win. Then the person with a tank fires and buries the monster. Apparently even the strongest monster can be hit by a snowball by surprise. "But where did it go" she shouted. Who was she...