spell book problem

I have a spell book and in the spell book two of my abilities are based off the same ability which makes both abilities the exact same ability. Is there any way to put two different abilities based of the same ability into one spellbook?

I don't think so. I think you need to find another base spell that does the same thing and use that, or else put them in seperate spellbooks. I'm having the same problem in a map I'm making, too. My suggestion is just to be creative and try to find a way around it.

Alternatively you could use triggers and dummy casters to get the desired effect. Dummy casters are unselectable, completely transparent units that are created via triggers. They are ordered to cast the required spell then are removed from the game.

I've never done that before but have probably read enough about it on this site to figure it out. I was wondering if it caused lag if they were used a lot, because in my map they will be. Thanks.