Scripts

Please help me understand. In the map editor, I open the arena object section, select, for example, a tombstone, change its model to that of a demon lord, and set the demon lord's animation. Now I have a demon lord that can be resized. I reduce its size by 4 times, place it on the map, and everything works fine. It is not a hero and cannot perform any actions, but how do I make it interactive, for example, so that if I touch it, some script is triggered? I tried to explain my problem, but it's difficult to put into words. If you happen to understand what I'm talking about, please help me figure it out.