Tungsten Ballsack

One target you can see finds that their family jewels have been turned into tungsten halving their movement speed on flat ground and, any incline greater than 60 degrees is considered climbing. (If target is female they will find that they now have a tungsten ballsack).

When the spell ends the targets movement returns to normal. However the tungsten ballsack remains unless dispelled using dispel magic, or if the caster chooses to end the effect.