I don't own Justice League or Fairy Tail just any OCs I may throw in and unlike in the prequel so far nothing from the Harry Potter series will be there just mentioned. Justice League shouldn't play any part after Mass Extinction arrives on Earthland.

After being incapacitated by Aria, Makarov is brought to the healing Mage, Porlyusica, deep within the forest east of Magnolia by Alzack and Bisca. After a quick examination, she concludes that Makarov's Magic power has been drained by Wind Magic and that his recovery would've been faster if they managed to collect his Magic Power. She chastises him for his recklessness, but still deeply cares for him. She then chases Bisca and Alzack away, unable to stand them being around her since she hates humans.

Meanwhile, in the guild, most of the guild members are injured after their attack on Phantom Lord. As some of the other guild members plan on their next attack, Elfman, Gray, Happy and Natsu notice Lucy's sadness. When questioned, Lucy tells the group that she's sorry, voicing out her anger over her father who orchestrated the war. She then tells them that the war may stop if she goes home but Natsu tells her that she doesn't need go. He tells her that she's better suited in the guild than in some mansion, dubbing her Lucy of Fairy Tail and tells her that the guild is her home. Hearing the words of her friends, Lucy is touched and begins to shed more tears.

Elsewhere, Cana is attempting to contact Mystogan by Magic Card but fails. Meanwhile, Mirajane is talking to Laxus by Communication Lacrima. Laxus refuses to help, saying that it doesn't concern him. Angered by Laxus, Mirajane breaks the lacrima and decides to fight as well. Cana tells her that she'll only be a burden, even though she was once an S-Class Mage.

Inside the shower room, Erza is thinking about the guild's current situation. She blames herself for not going with Makarov to confront Jose, but her thoughts are cut short by a sudden tremor. The guild members run outside and sees the Phantom Lord guild, mobile and walking towards their guild. Inside it, Jose Porla orders his men to prepare the Magical Convergent Cannon: Jupiter. Seeing this, Erza tells her guild mates to get down and goes to Requip into her Adamantine Armor, planning to stop the attack, surprising her fellow guild members. Jupiter then fires and Erza stops the attack with her armor. The armor is destroyed on impact but manages to hold the attack. However, Erza's Magic is greatly depleted and she is therefore unable to get up.

Seeing this, Jose points out that with Erza and Makarov both out of commission, the Fairy Tail Mages doesn't stand a chance. He then orders them to hand over Lucy but the guild members refuse, finding it despicable that Jose would think of them as someone who would give their comrades to the enemy. Hearing his enemies' defiance, Jose presents them with two options: be blown away by Jupiter in fifteen minutes, or be destroyed by the Shades, his creatures. Seeing their situation, Cana concludes that they need to do something with Jupiter. Natsu presents himself and goes to stop it with Happy. Gray and Elfman follow the two and Cana tells them that she and Loke will strengthen their defense. Meanwhile, Mirajane tells Lucy that they will send her into a hideout. Lucy refuses, wanting to fight as well but Mirajane casts a sleeping spell on her and tells Reedus to take her. Mirajane then transforms into Lucy, wanting to help her comrades at any cost.

Meanwhile, Natsu and Happy have reached the cannon and are attempting to destroy it from the outside, but to no avail. Happy suggests that they go inside and Natsu agrees. The two enters the cannon and finds themselves face to face with Totomaru, the Great Fire of the Element 4.

Fairy Tail's members are fighting with all their might to protect their guild and also to protect their comrade Lucy. They are fighting against Jose's Shades, but the Shades are proven to be indestructible. While Mirajane, who has used Transformation Magic and has disguised herself as Lucy, is watching the arduous war between Fairy Tail and Phantom Lord.

Meanwhile, inside the cannon, The Lacrima is reaching its full potential charging Jupiter. Neither Natsu nor Totomaru the Fire Mage and one of the Element 4, who has the ability to control fire of other Fire Mages, seem to be able to get the upper hand since both of their abilities render the other's fire ineffective. Natsu, trying to figure out another way of beating Totomaru, then pretends to hit him with Fire Dragon's Roar, but he instead spits at Totomaru, making Totomaru furious. He retaliates by releasing Orange Fire and when Natsu smells this, due his good sense of smell, his nose is gravely affected, but Totomaru claims that it was Natsu who had started. Happy, in the meantime, is panicking as the time for Jupiter to charge is very close, but he tells Natsu to remain calm.

Natsu then gives up his fire and uses melee combat, but Totomaru has a Katana. Natsu then devises a plan; he expands his fires greatly, and using the Flames of Emotion, making Totomaru unable to control them. Natsu says to Totomaru that it is his Fire and that no one will control it except him. Natsu aims for the Lacrima instead of Totomaru, and it is fortunately destroyed, stopping Jupiter from firing. Happy then claims it was he who was not calm. Natsu's victory inspires the other members of the guild. An angry Natsu is now more than ever determined to counterattack and crush Phantom Lord.

The destruction of the Lacrima which charges Jupiter inspires the Fairy Tail members and they reinforce their defense against Phantom Lord. Suddenly, the Phantom Lord guild changes its appearance, the tower becomes feet and the guild turns into a giant robot called Super Mage Giant Phantom MK II. The Fairy Tail members are surprised seeing this giant robot moving in their direction. Meanwhile the fight between Natsu and Phantom Lord's Element 4, Totomaru continues.

Due to the crumbling of some rocks from the Phantom Lord building, Happy is hit and loses consciousness. Totomaru claims that this is Phantom Lord's most powerful weapon. As the guild is now moving, Natsu's motion sickness is activated. Meanwhile, on the ground, Cana tells her fellow guild members to focus on the enemy in front of them and to forget about the giant moving building and to trust Natsu, but Max reminds her of Natsu's motion problem and Cana is shocked as she remembers this fact. Back inside the now moving guild, Totomaru seizes this opportunity and gets ready to launch his strongest attack, Rainbow Fire on Natsu. Gray intervenes just in time and freezes Totomaru, and Elfman then sends Totomaru flying with a kick.

Outside, the robot is completing a Magic circle, the one for Abyss Break, and so, Natsu, Gray and Elfman have no choice other than to run and find it's power source. Mirajane says that the circle will need about 10 minutes to activate, and also learns that inside, beside Natsu and Gray, there's also Elfman her brother, which worries her. Cana tries to comfort her by saying that Elfman is a Fairy Tail Mage too. This however, doesn't make Mirajane any less worried, but Cana says that after the loss they suffered, Elfman tried to find a way to move forward. Mirajane wants to move forward too, so she surrenders herself to Jose, transformed as Lucy. Jose, however, sees through it, and Mirajane suffers the real weight of her powerlessness. Meanwhile, Elfman is confronted by Phantom Lord's Element 4, Sol.