Fire Wall

Description
A wall of fire that burns enemies that tries to pass it.

Usage
This is a 4x1 tile trap that remains hidden until a unit steps on it. When revealed, it will create 5 short jets of fire that shoot out from it, and any unit walking over it will take significant damage and then combustion damage. On its own, the damage is not enough to kill many units, but the combustion damage, which is inflicted every second for 5 seconds after the initial damage, will likely kill most low-mid HP units, and still deals significant damage to high HP units. This makes it extremely dangerous to large amounts of units.