Book about mermaids *spells*

Spell 1

(say the spell ten times)
Insouciant inclemency
Redoubtable mediocracy
Refutable humanity
Make me what I wish to be
A mermaid
Witches* one, witches* all
Give this power to me

Pronunciation:
In-soo-see-ent in-klem-en-see
Re-dow-ta-bull mee-dee-o-kra-see
Re-few-ta-bull hew-man-i-tee

Meaning of the Spell (this is a word for word translation so it might not make sense):
Carefree severe
Formidable ruled by mediocrity
Proven false humankind

Make me what I wish to be
A mermaid
Witches* one, witches* all
Give this power to me

*you don't have to be a witch for this spell to work

When reciting the spell some part of you has to be touching water otherwise something really bad will happen.
You have to be a believer for this spell to work.
You have to be wearing something that is special to you (earrings, bracelet, necklace) this will become your symbol. You have to wear your symbol while reciting the spell and you cannot take it off for more than 2 hours at a time for the rest of your life.
It takes a month to become a mermaid.

After casting the spell do not look at the moon. Apparently the moon will take control of you much like in h2o.
There are some good side effects too, like extended lung capacity and the ability to sing really well.
Not everyone is effected by side effects but this is a rare exception and you also may not have done the spell right. Some girls experience other strange side effects like " I was about to get out of the shower i felt like i was gonna fall". Hope you don't go through too much discomfort and I hope it's all worth it in the end

Main common side effects are:
Nausea
Fatigue
Coughing fits
Trouble breathing
Thirst
Headaches
Salt cravings
Mood swings