Warning! This post contains SPOILERS for What If...? Season 3, episode 8Marvel reveals nineteen new the Celestial-powered Agatha Harkness in What If...? season 3, some of the MCU's most powerful characters made their debut in Marvel Studios' first anthology series.

What If...? season 3 episode 8 sees the Watchers' attempt to punish Uatu intercepted by Captain Carter, Storm, Kahhori, and Byrdie. Thanks to the heroes' oath to become Watchers themselves, Uatu is saved, and the other Watches agree to let his intervention go unpunished. As Uatu reflects on the infinite possibilities in the Marvel multiverse, the What If...? season 3 finale's closing montage reveals a few characters who inhabit some of the alternate timelines the MCU still hasn't explored yet.

1 Six-Armed Spider-Man

Peter Parker Grows Four Extra Arms In Marvel Comics' The Six Arms Saga

A mutated Spider-Man with eight limbs. In the comics, Peter Parker ingests a special serum in an attempt to remove his powers, but it backfires and causes the opposite effect, giving him four extra arms. Curiously, a 1992 issue of What If...? follows a Spider-Man variant who couldn't get rid of his extra limbs by any means. On the bright side, this unlucky variant is able to save Gwen Stacy from the Green Goblin.

2 Samurai Ghost Rider / Ghost Ronin

The Samurai Of Vengeance Might Be Among The Most Powerful Ghost Riders

An Edo-period samurai possessed by the Spirit of Vengeance. In What If...? season 3 episode 8's ending, the Ghost Ronin wears a classic samurai armor, wields a flaming katana, and rides a black horse. In the comics, Ghost Ronin is the moniker adopted by Marvel's adaptation of the real-life warrior Miyamoto Musashi, renowned for his swordsmanship. Carrying Zarathos inside of him, Ghost Ronin helps the time-traveling Avengers fight Mephisto in Edo Japan.

3 Punisher Ironheart

Riri Williams Wields High-Tech Weapons As An Alternate-Universe Punisher

A Riri Williams variant who uses her tech knowledge to become the Punisher instead of Ironheart. The first fully original character in What If...? season 3 episode 8's ending montage, Riri Williams wields several weapons and sports Frank Castle's iconic skull-shaped Punisher emblem on her shirt. Whereas Frank Castle usually carries a few regular weapons like handguns and machine guns, Punisher Riri wields laser-based gatting guns, cannons, and a machine akin to a grappling hook.

4 Witch Gamora

Gamora Resembles Frankenstein's Monster And Rides A Broom

An undead Gamora variant with traditional witch elements. This version of Gamora sports shiny black eyes and a tattered white dress while riding a broom. Agatha All Along confirmed that broom-riding is an actual practice in the MCU, though witches like Agatha consider it to be an annoying and stereotypical tradition. Gamora's witch appearance hints at her knowledge of sorcery, which might be possible in space given the existence of Krugarr — a magic-wielding member of Stakar Ogord's Ravager team, introduced in Guardians of the Galaxy Vol. 2.

5 Moon Knight Blade

Moon Knight Blade Makes His Debut In What If...? Before Marvel Zombies

A Blade variant who gets chosen by Khonshu to be his avatar. What If...?'s Moon Knight Blade wears a white costume and a black half-mask, and he sports glowing white eyes. Moon Knight Blade will make his official MCU debut in the 2025 Disney+ show Marvel Zombies, where he will hunt zombified Marvel characters instead of vampires. This Blade's cameo at the end of What If...? season 3 means that three different Blade variants have been introduced before Mahershala Ali's live-action character appears in the MCU's long-delayed Blade movie.

6 The Thanosverine

Thanos Gets Wolverine's Adamantium Claws In An Alternate Universe

A mash-up of Josh Brolin's Mad Titan with Hugh Jackman's Wolverine. The existence of a Wolverine Thanos suggests that a version of Weapon X took place on Titan, possibly before the planet collapsed. It’s also possible that this Thanos wasn’t only born with a mutation that made him purple, but also with an extra mutation that gave him bone claws, which presumably were later covered in Adamantium from a Celestial.

7 Kingo Iron Man

Kingo Becomes The Invincible Iron Man Instead Of Tony Stark

Kumail Nanjiani's Kingo wears an Iron Man suit in an alternate universe. What If…? season 3 episode 2 features a Kingo variant who works as an actor, similarly to his Earth-616 counterpart. However, this Kingo stars in a classic Hollywood movie made by Howard Stark. If What If...?'s Hollywood Howard Stark variant suddenly chooses to adopt his main variant’s profession, he could create an Iron Man armor for Kingo. Thus, Kingo could become Iron Man before Tony Stark is even born.

8 Wasp Ms. Marvel

Kamala Khan And Janet Van Dyne's Quantum Powers Combine

Either Wasp enhanced with Kamala Khan's energy powers or Kamala Khan wearing the size-shifting Wasp suit. Wasp and Ms. Marvel's powers may be more closely intertwined than they seem, as Kamala Khan's bangles seem to have ties to the multiverse, and Janet van Dyne acquired quantum powers during her time in the Quantum Realm. Janet also befriended Kang the Conqueror, who may have wanted to obtain Ms. Marvel's bangles and Shang-Chi's Ten Rings before his death.

9 Sorcerer Maestro Hulk

Hulk's Evil Alter Ego Maestro Becomes Sorcerer Supreme Before Benedict Cumberbatch's Doctor Strange

Hulk's older self performs magical spells and wears the Cloak of Levitation. Maestro is Hulk’s older, evil, and extremely powerful persona from a future timeline. What If…? season 3 episode 8’s ending montage takes Maestro one step further and makes him a sorcerer. Knowing What If…?’s wild takes on Marvel characters, the sorcerer Maestro variant might not only be a magic-wielding Hulk, but a full-fledged Sorcerer Supreme.

10 Scarlet Wizard Howard The Duck

Howard The Duck Wields Chaos Magic As A Scarlet Witch Variant

A mash-up of Hank Green's Howard the Duck and Elizabeth Olsen's Scarlet Witch. Whereas Howard the Duck fathered one of the most powerful beings in his universe in What If...? season 3 episode 4, the Howard the Duck variant seen at the end of What If...? season 3 episode 8 somehow obtained a powerful source of power all by himself. Somehow, this Howard wields Wanda Maximoff's Chaos magic and wears an outfit similar to the Scarlet Witch's, which might earn him the name of "Scarlet Wizard".