That's the thing about the Phoenix. There always has to be destruction... Before rebirth. 
Appearing in "Avengers Vs. X-Men (Part Twelve)"
Featured Characters:
- Avengers (Main story and flashback)
- Captain America (Steve Rogers) (Main story and flashback)
- Black Widow (Natasha Romanoff) (Main story and flashback)
- Iron Man (Tony Stark) (Main story and flashback)
- Hawkeye (Clint Barton) (Main story and flashback)
- Hulk (Bruce Banner)
- Thor (Main story and flashback)
- Wolverine (Logan) (Main story and flashback)
- Spider-Man (Peter Parker)
- Scarlet Witch (Wanda Maximoff) (Main story and flashback)
- Spider-Woman (Jessica Drew) (Main story and flashback)
- Red Hulk (Thunderbolt Ross) (Main story and flashback)
- Black Panther (T'Challa)
- New Avengers (Main story and flashback)
- Luke Cage (Main story and flashback)
- Iron Fist (Danny Rand) (Main story and flashback)
- Ms. Marvel (Carol Danvers) (Main story and flashback)
- Thing (Ben Grimm) (Main story and flashback)
- Doctor Strange (Stephen Strange) (Main story and flashback)
- Secret Avengers
- X-Men
- Storm (Ororo Munroe)
- Magneto (Erik Lehnsherr) (Leaves)
- Marvel Girl (Rachel Grey)
- Rogue (Anna Marie)
- Pixie (Megan Gwynn)
- Gambit (Remy LeBeau)
- Iceman (Bobby Drake)
- Angel (Warren Worthington III)
- Hope Summers/Phoenix (Main story and flashback)
- Kitty Pryde (Appears on screen)
- Three-In-One (Stepford Cuckoos)
Supporting Characters:
Antagonists:
- Phoenix Force (Death)
- Dark Phoenix / Cyclops (Scott Summers) (Main story and flashback) (No longer possessed by the Phoenix)
Other Characters:
- Professor X (Charles Xavier) (Only in flashback)
- Phoenix (Jean Grey) (Main story and flashback)
- Sentinel (Only in flashback)
- Namor (Photo)
- Emma Frost (Photo)
- Jia Jing ⏵ (First appearance)
Locations:
Items:
- Bleeding Edge Armor
- Captain America's Shield
- Mjolnir
- Cyclops' Visor
- Hawkeye's Bow
- Spider-Man's Web-Shooters
- Nova Helmet
Vehicles:
Synopsis for "Avengers Vs. X-Men (Part Twelve)"
72 hours before the final battle against the Scott Summers, the Dark Phoenix, Tony Stark was informing his teammates about recent events important for the situation they are going through now. He explains the connection between the events of the known House of M, the decimation of the mutant race and the Phoenix Force, which came to Earth in order to restore mutantkind, being responsible for the birth of Hope Summers, who was destined to wield the power of the Phoenix. And finally that Wanda's Chaos Magic and the Phoenix Force are connected in a cycle, as they were Yin and Yang. Stark continues his explanation, stating that he had to look beyond the limits of science, and discovered that the Scarlet Witch and Hope must work together to overcome the Phoenix.
Meanwhile, Wanda tries to talk with Hope and console her for the guilt she feels for not being able to save her people, and tries to convince her to join Stark's talk. After she tries to calm down Hope, stating that she can not blame herself for what Cyclops and the Phoenix Five have done, Hope looks back to her, stating that she should blame Wanda, principally for the decimation, although she can not hold total responsibility for her actions due to being unstable at the time. When Iron Man and Captain America are about to approach them, they see the two powerful women fighting.
The scene moves to the present, when Scott Summers is already the Dark Phoenix, and the Avengers are almost defeated by his power. From the Jean Grey School of Higher Learning, the Stepford Cuckoos are telepathically informing the Avengers about the havoc the Phoenix Force has caused around the Earth, such as earthquakes, volcanic eruptions and fire raining. From the Quinjet, Captain America announces to every Avenger and X-Man via radio that "the Earth doesn't die on our watch!"
Numerous teams of Avengers and X-Men are trying to contain the chaos in numerous cities of the planet, such as Paris and Beijing. The battle against Summers is finally moved to the Himalayas, where he blasts Thor away. After other Avengers arrive, and Captain America orders them to take Cyclops down, he creates a massive blast of fire, throwing them away. When Iron Man contacts for more help, Nova appears, and using his powers confronts Cyclops, who was leaving the fight, but is finally subdued. In that moment, Hope and the Scarlet Witch arrive, showing true determination to take him down.
The scene moves to when Hope and Wanda started fighting, they were stopped by Iron Man and Captain America, who convinced them not to fight against each other, but together.
Both women proceed to beat Cyclops brutally, while Hope remembers her training in K'un-Lun. The cavalry of Avengers arrive to join the fight. In that moment, Cyclops starts remembering his pasts, the values Xavier taught him, his friendship with Wolverine and the apparent death of Jean Grey. After begging for his death, the Phoenix possesses him again, and starts to incinerate everything around him. He has a vision of Jean asking him to stop, and is finally defeated by Hope and Wanda, forcing the Phoenix Force to leave him.
While Hope remembers a talk she had with Captain America after the fight with Wanda, that if they managed to retrieve the Phoenix Force from Cyclops, she should become the Phoenix, the cosmic force engulfs her, and she quickly flies away, with Iron Man following her. She starts repairing the damage Summers caused using the Phoenix's power, and finally returns with the Avengers and X-Men. She says she would keep it, and become the savior she was meant to be. But Wanda convinces her that although she was meant to become the Phoenix, she was meant to let go of the power rather than wield it. Hope, feeling overwhelmed by the cosmic power, allows Wanda to help her undo the damage from the "No more mutants" spell. They hold hands when both pronounce the words: "No more Phoenix".
The cosmic force leaves Hope and disperses around the Earth. Back to the Jean Grey Institute, the Stepford Cuckoos notices something strange with Cerebra, the appearance of new mutants. One young girl rescued by Spider-Man in China is one of the first to manifest her powers. The Avengers and the X-Men are celebrating the victory and the reinforcement of mutantkind when Cyclops recovers, guilt-ridden over the blood on his hands.
Later, an imprisoned Cyclops is visited by Captain America, the former taking full responsibility for his actions and those of the Phoenix Five. Rogers admits that the conflict was in part his fault, because the Avengers did not do enough to stop the discrimination against mutants, and allowed hate for them to grow. The consequences of the war are shown: Magneto and the rest of the Phoenix Five are global fugitives, Captain America is putting together a new group of Avenger composed of mutants as well, Wakanda is recovering from Namor's attack, Iron Man accepting faith can be combined with science, and Thor offering Nova a spot with the Avengers.
Scott tries to convince Captain America the Phoenix Force arrival made a new age for mutants possible, that sacrifices where necessary. Finally, when Captain America walks away with Wolverine, and while Hope is preparing to fly away from Utopia, Scott says that "there always has to be destruction before the rebirth". Hope flies off in a jetpack while a single rose blooms in the wake of all the destruction in the island.
Solicit Synopsis
Extra-sized final issue!
• It’s all come down to this! The final battle—as the world burns!Notes
- The events of this issue continue in Avengers (Vol. 4) #31, New Avengers (Vol. 2) #31, Uncanny X-Men (Vol. 2) #20, Wolverine & the X-Men #19, Uncanny Avengers #1, and AVX: Consequences #1.
- Cyclops, as Dark Phoenix, asks his opponents during a moment of lucidity to kill him. Jean asked for the same thing during a similar moment while fighting the X-Men as Dark Phoenix in X-Men #136, and implemented a plan to kill herself in X-Men #137.