Chapter 10 Full Moon.
Erik did indeed return for Ondina but he already knew the answer instead he proposed a deal he would help the gang regain the three sibling's powers and in return they let him stay around for a bit.
Now when the moon is near Mako the gang got to Mako with Ondina, Sirena and Rita going head to head with Nerissa and Evie getting the three inside the moon pool in time.
"We only have one shot make it count" Said Mr Morgan
"Dad what are you going to do you have no powers" Said Billy
"Don't worry son I have a few tricks up my sleeve" Said Mr Morgan who jumps off the boat transporting them to the island and into the seas and his legs become a tail with blue scales all over then resurfaces near the boat
"Dad you got a tail are you land boy or merman"? Asks an excited Billy
"Land boy son I'll explain later we have to go Ondina, Sirena, Rita we haven't got much time" Said Mr Morgan
"Ready" Said Sirena
"Always" Replied Ondina then the three Ondina, Sirena and Rita dive in afterwards Mr Morgan
Mr Morgan, Ondina, Sirena and Rita swim towards Nerissa and surround her in the water
"Hello Nerissa" Said Mr Morgan to an unexpected Nerissa
"Hello Nathan it's been a long time" Said Nerissa back to Nathan
"It's time to end this" Said Ondina and the three mermaids holds up each of their moon rings and their stone in the ring glows and releases light which forms a triangle shape producing some barrier/shield
Nerissa then tries to move away from the gang but finds herself trapped.
"You don't know what's at stake you have to release me" Said Nerissa
"Not a chance" Replied Ondina
Now back to the siblings who are sailing at high speed to the underwater entrance where all a sudden just as they about to reach the entrance the Water Tentacle rises from the sea along with a dolphin made of water too.
"Oh god" Said Evie who is meant to take the three to the pool and protect them
"I think that's the understatement of the year" Replied Billy then the two begins spawned from the moon pool attacks the four
"Evie do something" Yells Mimmi
"Go ahead I'll hold them off" Said Evie who then holds out one of her hands in the sigh for stop and uses her power to freeze water onto the two new begins who freeze completely but use their own power to put them back to the state they once was and knocks Evie all the way to the gang containing Nerissa preventing her for intervening
"The Dolphin if Nerissa created it she probably designed it not to hurt us" Says Billy
"But we don't know for sure" Replies Mimmi
"Well your about to find out" Said Billy who then dives into the ocean and within seconds the Dolphin goes after him
But as we all guessed the Dolphin is too fast for Billy and easily catches and traps him within itself where a strange energy begins to generate.
"What's happening" Shouts Mimmi to Zac
"I don't know" Replies Zac
"You have to free Billy from the Dolphin Nathen" Said Nerissa with great fear
"What's the Dolphin's purpose what is it doing to our son" Screams Nathen back at her
"It showing him their past all four of them" Replies Nerissa
Billy finds himself drifting through space as a echo seeing the past of Mako the past of himself and Zac as well as Mimmi.
In Mako moon pool in the past with the three siblings in the pool being attacked by a unknown figure with strange powers one of the attacks hits the three of them and as their lives are slowly fading away the full moon comes over head and the each sibling says.
"Come back to me no matter what happens" Says Zac from that time
"Always" Replies Mimmi's past self
"Forever as long the moon still shines at night" Said Billy past self and then they die and become sea foam in pool and the foam begins to be filled with pure energy from Mako and the moon itself and along with a dolphin that was in the pool with them at the time and then both the foam and the dolphin disappears from the pool in a flash of light
Billy still trapped inside the Dolphin comes out of the vision to see Nerissa trapped the moon over head and the three shells around Mako.
"Look Billy" Shouts Ondina
"What is he doing" Asks Nathen
What Billy is doing or rather what he has become was something unexplainable it was if he is one with the entity and swims towards Mimmi and Zac.
"Billy what's happening to you" Asks Mimmi
"Something magical we have to get to the moon pool now with the Dolphin our dolphin" Replies Billy with his head emerging from the water
"I don't understand" Replies Zac
"You don't need do now come on" Said Billy so then the two older siblings jump in merging with the Dolphin and they swim to the moon pool and resurface there
The moon over head bubbles begins to form and the Dolphin separates itself from the three and Nerissa dolphin who was her only companion swims to the moon pool and to the water dolphin the shells that surround Mako begin to dim and all a sudden the three siblings powers are released and return to Mako's moon pool and back into the three siblings but something else magical happens!
A great bright light comes and goes and a magical force is released from the moon pool only for the gang outside to be concerned.
"Do you think it worked"? Asks Ondina
"I don't know but look the shells" Replied Rita as the shells are magically destroyed since the three entered the moon pool along with the water Dolphin
Meanwhile in the moon pool itself the moon gone from Mako Zac and Mimmi resurface over joyed that they reclaimed their tales.
"Zac" Says Mimmi calling for her brother
"Mimmi we did it" Replied Zac the two hug only to realize no Billy
"Where Billy" Shouts a worried Mimmi
"Oh no Billy where are you Billy" Screams Zac at the top of his lungs
Then for a second all you could here is splash which hits Mimmi and Zac and they turn to see a much laughing Billy in their mists.
"Aha you should of heard yourself Where's Billy Oh no Billy so funny I had to" Chuckles Billy
"Ok Zac"? Asks Mimmi
"Ok Mimmi" Replied Zac
"Ok Billy" Says the two older siblings
"Yeah why" Said Billy before being bombarded with a massive splash bigger than one he ever seen which his two older brothers created