On October 2nd, Marvel Studios brings The Avengers: Age of Ultron to Blu-Ray and DVD, and with it comes a slew of new special features for fans to dive into, taking a look at the making of the blockbuster sequel. We’ve already seen the gag reel with your favorite superheroes messing up some takes, and now a new featurette has surfaced online from the home video release.

The featurette is called “Infinity Six” and it gives fans some background on the Infinity Stones in addition to recapping which ones we’ve seen in the Marvel cinematic universe (so far there have been four, with two more unaccounted for still). The video also features that quick credits clip fro Age of Ultron with Thanos finally deciding to get in the Infinity Stone collecting game himself.

Watch The Avengers Infinity Stones featurette below!

Thanks to CBM for bringing this video to our attention:

For anyone who hasn’t taken the time to research the comic mythology of the Infinity Stones online, this is a great primer that lays out pretty much everything about the stones that you’ll need to know as we move into Phase Three of Marvel’s cinematic universe and move towards the two-part sequel The Avengers: Infinity War.

The Infinity Stones are part of one of the most iconic story lines to ever hit the pages of Marvel comics, and that’s why some of the more hardcore fans went nuts when the credits scene from The Avengers in 2012 featured the mad titan Thanos and a tease at the chaos he would bring years later. In fact, by the time the Infinity War actually begins, it will have been six years since that scene was teased, and that’s a long time for fans to wait.

Just to recap, so far we have seen the stones that represent Space (the Tesseract), Reality (the Aether from Thor: The Dark World), Power (the contents of the Orb from Guardians of the Galaxy) and Mind (Loki’s scepter / Vision’s power gem). The remaining gems are for Time and Soul. More than likely the Time gem will pop up in Guardians of the Galaxy Vol. 2 and the Soul gem will probably come into play in Doctor Strange, but those are just guesses.

Once these stones are combined and placed into the Infinity Gauntlet, the golden metal glove that Thanos (Josh Brolin) puts on in The Avengers: Age of Ultron credits scene, they make whoever wields them nearly invincible. Therefore, if Thanos gets what he wants, he’s going to kick some Avengers ass. And don’t forget, there’s two Infinity Gaunlets in play too. But we’ve got three to four years before any of this really starts to matter.

The Avengers: Infinity War, directed by Anthony & Joe Russo and written by Christopher Markus & Stephen McFeely (all of Captain America: The Winter Soldier and Captain America: Civil War), arrives in two parts on May 4th, 2018 and May 3rd, 2019.