[quote=@Eyeris]
<Snipped quote by RokkuHoshi>

I'm not sure I understand what you mean. Explain?
[/quote]

I was thinking that he can cast spells on ponies because he knows how a pony body works. However, he can't cast a spell on humans because he doesn't know the workings of the human body. It'd be especially hard to do on gargoyles too.