Attack effects in bosses

Hello;
On my server some bosses, like Asmo, have no effects on their attacks. I have seen that Im not the only one, several servers that advertise here have not either. How could I add them? This is a video of Asmo from OS (I think) where attack effects shown:

By effects i assume you mean the debuff skills that bosses/mobs can use.

If this is the case, then you are most likely simply either missing the skill in skill.sdata, or you have not given the right skill ID to the mob/boss in it's attack settings.

Problems like this on many servers simply means that the "devs" for those servers clearly have no idea what they are doing, and the server shouldn't even be online.

Truth1010 for good server you dont need good devs like JuuF or Nubness but you need good idea for your server and basic knowledge.
Problem is because too many ppl want have own server and soon will be more servers like players

Never said you need to be as good as some of the better devs around, but not understanding the VERY basic nature of linking a simple problem to 1 very distinct file/area of the server means you are gonna have a hell hard time when you get any REAL problems that you need to fix.

I stick to my point that if a server 'dev' can't fix simple problems like mobs having incorrect skill defs, or missing skill defs, among other things like "invisible armor" or armor that appears glowing white. They shouldn't have an online, public server. They need to take it down, learn what they are doing, fix the crappy bugs and then put it online.

None of this has anything to do with OP's problem though, so maybe my first post helped them find the problem they were having.

Thank you Truth, but I did not mean the skills, but the effects that attacks do (the trail of the sword, falling rocks, etc). I solved it by replacing all files in the 'Monster' folder, except sdata files, from another client.