Board Thread:General Discussion/@comment-7308185-20160420151904

The way this works is that you place an Ice Tower behind a Bloonchipper, relative to the track. Upgrade the Ice Tower to Ice Shards. When the Chipper ejects the bloons, they will be frozen by the Ice Tower before returning to the track.

This is surprisingly deadly on Monkey City (Mobile of course). Not even Zebras stand a chance! 