Crystal Frost

The Crystal Frost support both damages and freezes enemy units. It can be produced at your artillery factory once the corresponding Gauss technology is researched, and requires at least a level 13 artillery factory. It costs 400 ammo and 400 ionites, and takes 1h6m40s to create.

Note that there is a slight, but perceptible, pause between when you drop the support and when it activates its effect, so be sure to take this into account when aiming.