How do I make a spell rune that effect movement speed?

[95Assassin]

So I'm playing around with the Creation Kit and trying to make a spell rune that make enemies move slower when they walk on it.
But as far as I see you're not able to attach the movement debuff that is used in the frost attacks in the format of a rune so is there any other way to do it?

[Shivzz0119]

Have you tried using scripts?

Character's speed in Skyrim is set by a modifier aptly named SpeedMult and its an actor value. If you're comfortable with scripts, you should be able to run a script that modifies this actor value on the rune.