Jump Down/Not Up Check Terrain Height?

[Legacyspy]

I've created a jump spell for one of my maps, however I want people to only be able to jump down cliffs or straight. I don't want people to jump up cliffs I am wondering if there is a way to check the terrain height or cliff level at points so I can prevent the unit from jumping.

If not is there anyway other way I can accomplish this?

 

[bOb666777]

Environment - Terrain Cliff Level

Integer Comparison --> If (Terrain Cliff Level At (Position of (Casting Unit)) Greater Than Terrain Cliff Level At (Target Point of (Ability being cast))

 

[Legacyspy]

Thanks!