Mixing spell qualities

This thread is about how to mix spell qualities. A question and basic example of mine is 'how would I mix faerie fire and slow?" Let's use the 'creep slow' as our experiment spell to screw around with. I want it to look and sound like slow, so I keep the uberAlias column the same (Aslo). But I want it to behave BOTH like faerie fire and slow. Meaning I want it to reduce the unit speed like slow, and reduce the armor like faerie fire. This is where I am confused. If I change the code column to 'Afae' (faerie fire's code), then shouldn't I be able to plug in the -armor effect in the data columns? But then with the code as Afae how would I get the slow effect as well? You see my dilema? There must be a way to mix a spell. If anyone can figure how to mix a spell/aura, then it unlocks the door to creating totally unique spells. You could do anything practically. This is definitely an issue I am going to concern myself with, and I'm hoping there's somebody else out there also trying to figure this out.

I tried but the problem is the second collumn, which indicates which spell ID it should look up into and gives the spell it behavior. The other two columns a and c are just data (first one provides entry for clone spell, second entry provides which art)

however, spell effects were not editable, sorry
(Ive evne tried putting the black arrow back in, no luck)

Unfortunately you can't really combine effects like that.
Sometimes you can if the code for a spell is shared by multiple spells. For instance, Thunder Clap shares code with Frost Nova. They have identical fields in AbilityData.slk - but one version is targeted while the other is not.
What you can do is alter the graphics that some spells use, especially if it doesn't use a buff. Buff art is shared between all versions of a spell, be they creep or not.
It's a restriction that will hopefully be fixed in the expansion - perhaps by allowing abilities to run JASS scripts who can perform the desired effects on units.


FYI:
The alias column is used if you just want a quick & dirty copy of a spell - using the same art & text as the original.
The uberAlias column is used if you want to replace all the art & text for a spell. Be aware that this does not apply (yet) to buffs.