Mod requests (orders).

Did it turn out like a sling trap?

Here's my version: the throwing animation from a goblin in a Tower, and here are just goblins throwing stones.

Yes.
You have the animation from a different goblin, so the chain doesn't work there.

Added 8 hours 21 minutes ago
Valera 111, I don't know what you had in mind, but if you don't like this option that I suggested, you can make the trapper not a ranged attacker. For example, a Tier 1 Necropolis unit, there's only one ranged attacker there. Leave the trapper as is, and make the regular goblin and the goblin shaman (the drum disappears normally) ranged attackers with the animation of a regular goblin. Or, you could try to remove the chain and trap during the shooting animation of a regular goblin. I don't know how to do that.