Hello mortals! I do not know if this exists already, but it recently felt on my mind, so maybe it is workable. i tried it and it is. So I bring to you special effects (just befor Halloween).
You got bolt, cloud, fire and green gas. They are appearing periodically at nearby/various positions. No trigger, anything like that.
So, whats trick? Those are basically infantry with 8 empty blank frames, but their idle frames are those effects! Plus, using ARES they have IsCow=yes tag so they randomly move around. Logically, infantry are immune to damage and all of that, unselectable etc... Result is from time to time effects appearing!
Just put files, set up examples I provided you, put them manually in map and watch. Suitable for many maps, for Halloween as well.
Because there are 4 of them, I wont put here codes, they are in separate file inside pack.