Freeze

"A surge of ice freezes all enemy units in a lane, stopping their movement and attacks for 5 seconds"

Freeze is a Spell that can be used offensively to damage enemy troops without being attacked back, or defensively to stop enemy troops from capturing cannons.

Upgrades
At level 9, the Permafrost skill is unlocked. This increases the duration of the Freeze Spell by 3 seconds, bringing the total duration to 8 seconds.