I'm actually surprised this is the first I've seen fanart of it. The similarities are pretty obvious.
Damon, I think I remember you talking about Fallout Equestria... http://theovermare.com/blog/2014/04/flow-of-animations
Changlings control people's minds, then feed on their emotions. They're the only ones who use green magic.
though I wouldn't be terribly surprised if the author didn't intend it to be a 'sounds like' for Abra Kadabra, it's an awful coincidence if it's unintentional.