Frozen Feet (sliding spell)

What this spell does is allows a unit to slide along the ground at a customizable rate allowing it to escape battles or get right into the roughest part of them I made sure that the unit couldnt hop cliffs or anything with a neat little error message ^_^. so heres the map.
just so you know this is for the spell contest.

lets see. ai caramba. i just found out my message hast to be at least 10 words long. o_O
i will edit the rest in later.

edit 1: spellsubmint ??? wtf

edit 2:
general idea: meh. dont like it much.
i did like how you found out about the height. easy to implement.period.