How do I change a unit? Auto-translated

I was misunderstood – the question is only about how to add the animation for the "shot"/projectile that I need. The attack across the entire Arena has already been implemented; it just looks mediocre without the corresponding animations.

basically...
Attachment 70843
but attacking with "air units" doesn't look very good, of course.

Try specifying the path to the visual effect of Armageddon here (I did this once to make the hero's regular attack trigger a meteor strike and Armageddon).

😅 yeah... and it seems I wasn't even close to looking in the right place. I'll try now... (but at least it's clear when and where I found it).

Added 1 hour ago
Thank you, progress has been made. However, the question remains of how to make it summon a projectile for each enemy, and not just the main target. I hope I'll figure it out...

*Where the idea with the lightning originally came from. A long time ago, I had a mod called Gods or something like that, where one upgrade gave people AoE attacks (like Dancers, including ranged) and, for example, when Monks shot at multiple targets, it summoned a "meteor" for each attacked enemy. It looked cool, and that's when the question arose - "what if we increase the scale?!"

No, there, the "Monk's projectile" fell one by one on each of their attacked targets (if, of course, there were several), and it seemed to me that this was a standard mechanic - if you have an AoE in ranged, and you are, say, not a Rune Golem Priest or a Lich, for whom the AoE effect is a perk with a fixed effect...
*i.e., for the Archers from the same mod, the arrows also split during flight and one flew to each of the targets, if any.
*i.e., the projectiles fly only to existing targets in the area of effect. Shooting at one - one projectile flies, shooting at three, one separate projectile flies for each... (in general, it's complicated. It was easier on paper.)
---
I think either I implemented AoE differently (although adding "War Dance" to the abilities, as I have already found out, does not affect anything at all, except for displaying the perk in the game), or in that mod there were additional manipulations for this effect...

Hello. I have encountered a problem when replacing Bone Dragons for Necropolis. More specifically, the bone and ghost ones (the Spectral ones changed as needed).
I replaced Necro T7 with the previous T6 (i.e., now Heralds instead of Dragons, and I put another unit in the Heralds' place). However, after saving the changes and launching the game, their "Skeletons" and "Geometries" disappeared. And if I understood correctly, the file they referenced (Skeleton and Geometry of the Heralds) was also erased. No such problems were observed with other changed units! In general, I hope experts can explain what is wrong.  
----
*I think this might be because the names of the pre-DLC creatures are very long. They had an issue with embedding. If anything, I change units through the Map Editor (I don't know how correct this method is, but for now it's the most convenient for me).

Got it! Thanks! But how do I do what I need then? Or can I create normal links to files?

Added 4 minutes later
This error also broke the game itself, specifically the affected units.
The only way to fix this is to delete this map-mod. Of course, it's also my fault; I remember encountering something similar when I was experimenting with Assassins. You need to save such maps after changes using "Save As" so that you can "roll back" if something goes wrong. Otherwise, it's a dead end. It's an unpleasant situation right now.