The Freeze Scroll can be built at the Scroll Statue.
The Freeze Scroll can freeze multiple buildings for other troops to attack, and deals damage to Fire Demons due to their ice weakness. It is especially effective on Lightning Towers and Freeze Towers, allowing units to destroy them before they even get a shot off.
The actual radius of the scroll is a bit unintuitive, as the only buildings that will be frozen are the ones with the left most corner inside the radius. Thus, you can be nearly on the center of a building and actually fail to freeze the building.