Ice Wall

Description
A wall of ice that freezes enemy units that try to pass it.

Usage
This is a 4x1 tile trap that activates whenever an enemy unit steps on it. It remains active for 10 seconds, and any units walking over it in that time will have the frozen debuff, halving their movement and attack speed. It is most effective against groups of units, and effectively slows down an assault and makes enemy units far easier for the defending units to fight. A popular strategy is to use it in front of a Wind Cannon, as frozen enemy units will find it impossible to get close.