I am trying to make an NPC use a spell, but the NPC has 20 destruction and it doesn't use the spell unless it has 25 destruction. I want to keep level scaling on, so I can't modify the base destruction of the NPC. Is there any other way for me to modify it or somehow get the NPC to use the spell with less than 25 destruction?
The only way this works is by changing the race's base destruction skill... which I do not want to do.

Create a replica spell without the level requirement.

How would I do that? There doesn't seen to be anything dictating a level requirement. I even tried making the spell using the template from a novice spell and it still didn't work.

"minimum skill requirement" under the magic effect. Set it to 0 and see if it works. What's the combat type for the npc?