The next day, after school, Ami contacts Usagi. Since Chibiusa is standing close, she can hear the conversation.
"Mother will be angry." Ami says. "There's water everywhere!"
"What happened?" Usagi asks.
"Well..."
Ami tells him that while she was taking a bath, she started singing Watery's name.
"It rhymes with Mercury, after all." Ami explains, and as Usagi insists, she hums. " O Watery, o Watery, I am Sailor Mercury. O Watery, o Watery, grant your power upon me, Mercury. "
Then the Clow Card manifested in her room, splashing water everywhere. Ami, hearing the noise, transformed into Eternal Sailor Mercury and went into the room. Watery, seeing her transformed, must have thought that Mercury wanted to practice combat, so the Clow Card started to attack her.
"I was able to avoid her attack," Ami continues to explain, "but Watery, well angry, moved all over the house. She put water everywhere!"
"Oh my!" Usagi replies to her. "How did you stop her?"
"I explained to her that I was willing to practice my water powers with her, but not right away. Watery seemed to understand, because she calmed down. I ordered her to become a card again and she obeyed."
This solved one problem, but Ami has no idea how to get rid of the water. Chibiusa tells Usagi to tell Ami to use Watery to reabsorb the water. Usagi thinks this idea is stupid, but Ami loves it. She tells Usagi to thank Chibiusa then hangs up. Usagi passes the message and Minako contacts her. She panics.
"Minako? What the—?"
"Usagi, Chibiusa! Hikawa Shrine is on fire!"
"WHAT?!" Usagi and Chibiusa shout at the same time.
"Firey must have attacked Rei and set the fire. I'm on the spot with Mako, but—"
"But what? You have to help Rei!"
"I would, Usagi, but the flames are too big. We need you and the Silver Crystal's power if we are to get in!"
"We're coming!" Chibiusa said.
Before leaving, Chibiusa warns Ami. The mother and her future daughter transform on the way.
When they arrive in front of the burning shrine, Sailor Moon and Chibi Moon join Minako and Mako. They transform into Eternal Sailor Venus and Eternal Sailor Jupiter. Strangely, there is no one around. Not worried people, nor firemen, nor police. Moon finds this strange, but she doesn't have time to worry about it.
Using her Silver Crystal and Chibi Moon's Pink Moon Crystal, a protective barrier is created and the Sailor Guardians can enter the sanctuary without being charred. They didn't wait for Ami, because every minute counts.
In Hikawa Shrine, while staying together to remain in the protection, they start looking for Rei and her grandfather. They find Rei, transformed into Eternal Sailor Mars, on the ground and badly injured. Burns are all over her body. Her eyes are closed, but she is breathing. A little further away, in a circle of flames, is Rei's grandfather. He seems unconscious.
"Look!" Venus says.
She points to a creature made of flames standing in the air.
"That must be Firey." Says Jupiter.
Firey has the appearance of a teenage androgynous angel with orange wings and eleven long ears. Firey appears to be naked, but hir body is hidden by flames and hir wears only a red headband. Chibi Moon wastes no time.
"O key concealing the powers of darkness. Show your true form before me. I, Sailor Chibi Moon, in the name of my contract with Sakura, command you. RELEASE!"
The magic key turns into the sealing wand. Firey, seeing this, launches fiery attacks towards the Sailors Guardians. The two crystal's protection holds, but the heat is intense.
"If this continues," says Jupiter, "we'll end up roasted!"
"NOOOOO!" Venus shouts. "I don't want to become a chicken!"
"Huh?" Chibi Moon asks. "A chicken?"
"I'll take care of it!" Says Moon.
She prepares to attack Firey, but Chibi Moon stops her.
"If you use your powers, the Silver Crystal will no longer protect us! My Pink Moon Crystal won't be able to maintain the protection by itself! Firey's attacks are too powerful."
"But then, what to do?" Moon asks, and then she calls Mars for help. "Mars! Sailor Mars, wake up! Please wake up!"
Sailor Mars doesn't wake up.
"We need you! Your grandfather needs you!" Keep begging Moon. "Please!"
She still doesn't wake up. Firey continues to attack them and then a voice is heard.
"FIREY! It's us you have to face!"
Eternal Sailor Mercury arrives. She holds Watery in her hand.
"Watery, with me!" Mercury said. The Clow Card lit up and Watery appeared. "Mercury..."
Watery creates water dragons.
"Aqua Rhapsody!"
The two attacks combined extinguish Firey's fire attacks. Hir isn't happy. The Clow Card counters with a torrent of flames and, although Watery was able to reduce its power, Mercury gets a first-degree burn on her arm. The Sailor Guardian of Water and Knowledge screams in pain.
"NO! MERCURY!" Moon shouts.
"Mercury!" Say Jupiter and Venus.
"Watery... Sailor Mars..." Says Chibi Moon, also worrying about Rei.
Suddenly, like a miracle, Mars opens her eyes. She can hardly move, but she whispers something unexpected.
"Watery... may I... channel… you? Mercury... authorize..."
Her words surprise all the Sailors, but Mercury gives her permission without further ado. Sailor Mars then utters an incantation. As she quickly whispers it, Chibi Moon doesn't understand it all except for the words "maiden," "water," "spirit" and "enter," then the incredible happen.
Watery turns into a swirl of water, goes to Mars, enters her body, and the Sailor Guardian transforms. Sailor Mars' hair becomes dark blue and very, very long, like Watery. Her eyes become bright, as if a light was turned on in them. Her Sailor Guardian uniform remains the same, but blue is added to the red. The burns disappear and the transformation is complete.
"Wow..." Sailor Jupiter said.
"Mars, is that you?" Sailor Moon asks.
The Sailor Guardian leaps to her feet and speaks. Her voice is a little different, but Moon recognizes Rei.
"I am... Sailor Watery Mars."
"Watery... Mars?" Said Sailor Venus, surprised.
"That's amazing." Said Chibi Moon. "Since when can Mars channel spirits?"
That's a good question. Watery Mars continues to speak.
"FIREY!" She said with anger in her voice. "You've caused enough trouble. Let Chibi Moon capture you or else—!"
Firey simply laughs and throws a large fireball in her direction. Watery Mars raises a hand and a big water spray stops it and puts it out. This angers Firey.
"All right. I'm going to have to do this the hard way!" Watery Mars exclaims. "WATERY..."
She spins her right arm once and blue flames shoot out of her hand. The flames turn into eight blue balls around her.
"MANDALA!"
The blue balls, being of the water element, rush towards Firey. They explode. Firey is paralyzed and very weakened.
"Chibi Moon, NOW!"
Chibi Moon runs out of the protection, diminishing its effectiveness, and she hurries to capture Firey.
"Return to your original form, Clow Card!"
Firey screams and turns into a card. The flames created by Firey disappear immediately. Hikawa Shrine returns to normal. Sailor Mercury's burned arm returns to normal, too. The fire element card goes into Watery Mars' hand. She smiles, closes her eyes, and Watery comes out of Rei's body, de-transforming her in the process. The Sailor Guardians do the same, Chibiusa turns the wand back into the magic key, Watery becomes a card again, and Rei's grandfather wakes up. He doesn't remember anything.
One more Clow Card captured! There are five left. Rei quickly writes her name on Firey and her friends keep bombarding her with questions. "Since when can you channel spirits?", "Can you channel Firey too?", "Why didn't you tell us before?", "Can you summon ?" etc., etc. Only Chibiusa doesn't ask her any questions because she can see that it makes Rei angry.
Finally, Rei kicks everyone out. Usagi, angry, goes to get an ice cream and Chibiusa follows her.
