Spell Editing Help - Not showing up in game

I've started working with spell editing recently (I have a map ready for it, I just want to add something extra to make it really stand out), but I'm having a problem with it.

I can give the ability to the character (in this case, a hero I named a Wraith) in the World Editor, but when I play the map, it shows up as the Sammy face. It also says "No Tooltip."

When I selected it (to learn the skill), it doesn't appear like the normal skills. It's a direct damage skill (similar to Death Coil), so I don't know if it works otherwise.

Does anyone know why this is happening? I thought it might have something to do with the UndeadAbilityStrings.txt file, but it seems to be in the right place.

Any help would be greatly appreciated, thanks.

Put the files you need in a Units folder in your wc3 directory, and then open up we, add the skill to the hero, and then implement the files. I even made implementing easy with the spell implementing file. And if its a new spell, you gotta give it a new uber alias and put in data for it in a abilitystring.txt and a abilityfunc.txt file. Best way to do this is take the spell you made it from, copy that to the bottom of that txt file, and then change the [xxxx] part to the uber alias of your spell, and edit the other part. Do this for both the string.txt and func.txt and you should be able to make it work.