Hey guys, spells aren't my thing. I can usually hold my own for what I need, but scratching my head with this and need some help with it if anyone is willing

What I want is a spell that has an effect that gives off a constant shader effect. I would like to add this to dead animals when you kill them. The one I have now, which was mostly just guess work and uses a frost effect shader for testing, only shows the frost shader effect once when the animal dies, and it lasts about one second. I need it to be contant, maybe even flashing on and off would be cool. Then I'm going to remove the spell when the animal gets removed.

Scripting I can do, magicks not so much

Just something I'm working on for fun really, nothing serious