So what you're going to need is spell and Jewelry like a necklace saltwater and a penny. So what you're going to do is kiss the bracelet or necklace or ring and put it in the water put the Pennies on the side of it if it's a ring put the pennies in the middle of it if it's a necklace or bracelet and then say the spell 5 times the spell is "gods and goddesses of the sea I want to be a mermaid so mote it be" once you say that five times take out the bracelet or necklace or ring put it on until you wake up in the morning and then take a shower no bath wash off the bracelet ring or necklace when you go in water with that piece of jewelry on put body lotion on your legs and your Finn should start growing
Side effects your legs will start being together your legs and feet will hurt you hear voices in your head that claim their mermaids or fish and when you go swimming fish should come near you.
