I wasn't here when Spell Casters was formed, but maybe it was the part that made this a "Entertainment website" as anyone could do whatever they want. Does it suck? Yes very much so since if I were to write a Dragon Spell to attract money, it would definitely disappear under the army of transformation spells. Still, it's a fact of life that we must handle.
To the person who made this thread, I'm sorry but like almost everyone said you cannot change what you are physically. You can certainly swim in water, be close to the sea, maybe buy a mermaid tail from a vendor and pretend you are a mermaid but actually becoming one? No, sadly that cannot work.
Plus why would you want to be a mermaid? As a human you have great potential. Heck you can start swimming now, practice really hard and become an Olympic swimmer! Plus as a Mermaid wouldn't you have no internet? No TV? No family? Honestly I would enjoy the life you have now as it is precious.