Snowman Slaughterhouse

Commander C has been reading A LOT of Calvin and Hobbes and plotting.
I found this in his suitcase:

(C.Z.G. Montana list for SNOW!)
(Build Snow Castle, Make a snowman with dad, Head butt it on the deck, Make a snowman with umbrella if it rains, make snow cannon with ammo, Make 2 armies of tiny snowman, Make a fort with 25 snowballs, Kill a snowman *evil face*, Snowfight with brother *cunning face*, Ambush Dad)

If only it would snow instead of rain!