I've seen alot of spells and such that can change you into a vampire, give you a mermaid tail, turn you into a wolf, give you wings, ect. Let's say these spells work (I believe they do but for those who don't, let's pretend). What would happen if you did two or more of these spells? For example, you do a spell that give you a mermaid tail and a spell that lets you transform into a wolf. Would these spells effect each other and cause chaotic events and side effects within your body? Or would they just not effect on another?
Please no responses such as "These spells don't work" or "You can't change into something non-human." I'm saying if these spells work, what whould happen.