The Marvel Cinematic Universe is tied together by two things – Robert Downey, Jr. and the Infinity Stones. This article sadly only focuses on one of them. Over the course of fifteen separate films, the Infinity Stones have slowly been introduced, building up their importance and paving the way for the Thanos the Mad Titan to take center stage as the over-arching villain that brings all of our heroes together.

What Are The Infinity Stones?

Before creation itself, there were six singularities. Then the universe exploded into existence, and the remnants of these systems were forged into concentrated ingots… Infinity Stones.

In Guardians of the Galaxy, the Collector describes the creation of the Infinity Stones. They are relics that pre-date the universe itself, and each is immensely powerful and destructive. In the Marvel comics, they are referred to as “Infinity Gems” and while they have much the same powers, they are different colors from their Cinematic Universe counterparts. When used together, the Gems are much more powerful. After acquiring all of the Gems and placing them in the Infinity Gauntlet, Thanos used its power to destroy half the universe in an effort to win Death‘s love.

In story terms, the Infinity Stones in the Marvel Cinematic Universe are the driving force behind uniting the Earth-based heroes like the Avengers, Doctor Strange, and Spider-Man with the galaxy-based heroes such as the Guardians of the Galaxy and Thor. In Avengers: Infinity War due for release in 2018, the majority of the heroes from the MCU will unite to face the threat of Thanos.

Where Are They Now?

As we know, there are six Infinity Stones – Space, Reality, Power, Mind, Time, and Soul. So far, five of them have appeared in the Marvel Cinematic Universe while we eagerly await the reveal of the final Stone. So which Stones are already in play?

The Space Stone, aka the Tesseract, aka The Blue One

First Appeared in: Captain America: The First Avenger

The Space Stone is currently contained within the Tesseract. During World War II, the Red Skull harnessed its energies to power advanced weapons for HYDRALoki later used the power of the Tesseract to open a portal to allow the Chitauri to invade Earth. The invasion was repulsed by the Avengers, and the Tesseract was given to Thor to secure in Asgard’s vaults.

The Reality Stone, aka the Aether, aka The Red One

First Appeared in: Thor: The Dark World

The Reality Stone is contained within the Aether. Thousands of years ago, the Dark Elf Malekith tried to destroy the Nine Realms with the Aether. He was stopped by Odin’s father, Bor and the Aether was hidden away as it could not be destroyed. The Aether was accidentally rediscovered by Jane Foster, which brought Malekith out of hibernation and he once more attempted to destroy the Nine Realms until defeated by Thor. Rather than keep the Aether, the Asgardians sent it to the Collector’s museum because they believed it was unwise to have two Infinity Stones in close proximity to each other.

The Power Stone, aka the Orb, aka The Purple One

First Appeared in: Guardians of the Galaxy

The Power Stone resides inside the Orb. Thanos tasks Ronan the Accuser with retrieving the Orb but when the Kree learns of its true nature, he betrays Thanos and takes the power of the stone for himself. He tries to destroy the planet Xandar, but is defeated by the Guardians of the Galaxy. They entrust the Orb to the care of the Nova Corps.

The Mind Stone, aka Vision’s favorite accessory, aka The Yellow One

First Appeared in: The Avengers

The Mind Stone was originally held within the scepter Loki used when he attempted to conquer Earth with an army of Chitauri. It is responsible for giving both the Scarlet Witch and Quicksilver their superhuman powers due to experiments carried out by HYDRA. The Mind Stone was instrumental in the creation of Vision, an artificial lifeform. The stone currently sits in his forehead, and grants him the ability to fire energy blasts.

The Time Stone, aka the Eye of Agamotto, aka The Green One

First Appeared in: Doctor Strange

The Time Stone is encased within the Eye of Agamotto, a powerful magical relic guarded by the Masters of the Mystic Arts. Doctor Strange mastered the power of the Time Stone to defeat Kaecilius and the powerful entity known as Dormammu, ruler of the Dark Dimension. Because of its power and the fact that Doctor Strange had still not fully mastered his power, the Eye was returned to the library within Kamar-taj.

Which Stone Is Left? (The Orange One)

The last Infinity Stone unaccounted for is the Soul Stone. Where it is or who has it is currently unrevealed. The only thing that we know for certain is that it is orange.

With the release of Guardians of the Galaxy Vol. 2, there are only three standalone films between now and Avengers: Infinity War. Given the title of the film, we can be reasonably sure that it will feature all of the Infinity Stones. So which of those three films will feature the final, elusive Infinity Stone? Of the three – Spider-Man: Homecoming, Thor: Ragnarok, and Black Panther – it is probably safe to assume that it will pop up in the third Thor film. Barring a complete curveball from Marvel, the Soul Stone appearing in Thor: Ragnarok is the most logical choice.

So Where Is It?

Ever since Marvel began incorporating the Infinity Stones into their Cinematic Universe, theories about the locations of the stones were bandied around. Some fans correctly guessed that Loki’s Scepter held the Mind Stone, and that the Eye of Agamotto would also be the receptacle for one of them, although opinion was split about whether it was the Time Stone or Soul Stone.

Heimdall Might Have It

Check out the gem in Heimdall's armor – have we already seen the Soul Stone in the MCU?

One of the most popular theories is that the Asgardian Heimdall has the Soul Stone. Heimdall has the power to see almost anything in the known universe, and states in Thor: The Dark World that he “can see Nine Realms and ten trillion souls.” Of course, he could just be being poetic in his choice of words, but look at his eyes. They are the same color as the Soul Stone. Want more fuel for the theory? In The Dark World, Heimdall’s armor features a stylised image of Ygddrasil, the World Tree. Atop the design is a single orange gem set into the armor. Does the Soul Stone give Heimdall his unique powers?

Another piece of evidence lies in Thor’s vision in Avengers: Age of Ultron. Under the influence of the Scarlet Witch, and later the Water of Sights, Thor sees Heimdall without his signature orange eyes. His fellow Asgardian tells him that they are all dead, and that Thor led them to Hel. Given that in Norse mythology Ragnarok is the end of the world and the trailer for the upcoming film shows destruction coming to Asgard, could Heimdall be killed for the Soul Stone in his possession?

There is evidence that discounts this theory, however. In the post-credits sequence of The Dark World, Volstagg and Sif take the Aether to the Collector for safe keeping. They do this because they already have the Tesseract in Asgard’s vault, and believe it is unwise to have two Infinity Stones together. This statement would seem to discredit the theory that Heimdall possessed the Soul Stone. Of course, it could be a closely guarded secret and by the end of the film, Odin has been secretly replaced by Loki as king of Asgard.

Or Maybe Hela?

thor ragnarok cate blanchett hela crushing thor's hammer

Thor: Ragnarok will introduce the character of Hela, the Asgardian goddess of death and ruler of Hel and Nifelheim. Her entrance into the Marvel Cinematic Universe already has severe ramifications judging by the trailer: she destroys Mjolnir, and brings ruin to Asgard. But could Hela hold the Soul Stone? As the goddess of death, she oversees the souls of the dead, making it fitting if she is its guardian.

There is also another angle to consider – Hela could be the Marvel Cinematic Universe’s incarnation of Death. The MCU has never been shy about combining and changing elements from their comic universe to fit a better film narrative. Just look at the Tesseract/Space Stone itself which combines the Space Gem with the Cosmic Cube.

Why is this important? Because Death is one of the objects of Thanos’ desire. He fell in love with her, and part of his approach to winning her affection was presenting her with souls she could rule. In true Thanos style, this meant killing a lot of people. If the character of Hela is merged with Death, she could form an alliance with Thanos. If she already has the Stone, then Thanos is one step closer to his goal. If Heimdall has the Stone, then Hela invading Asgard and killing him for possession of the Stone is a likely outcome.

Third Contender, The Grandmaster

Jeff Goldblum as the Grandmaster in Thor: Ragnarok.

Set to debut in Thor: Ragnarok, the Grandmaster will be involved in events that eventually lead to Thor and the Hulk battling each other in gladiatorial combat on the planet Sakaar. While we do not know much about his role in the film yet, we can speculate that he is another candidate for possession of the Soul Stone. In the comics, the Grandmaster is one of the Elders of the Universe, and for a time possessed the Mind Gem. It would be a simple matter of adjusting his storyline and giving him control of the Soul Stone.

Mike Delaney
Star Wars fan and general pop culture addict. Only two beverages worth drinking are tea and whisky.