Jason Momoa has shared a new featurette that gives fans a glimpse inside the physicality and psychology of Duncan Idaho, his character in Dune. Titled Dune Awaits: Becoming Duncan Idaho, the three-minute video was shared by Momoa on his YouTube channel.

The actor provided some necessary context to viewers who perhaps might not be aware of the sprawling world of writer Frank Herbert’s novels, and the epic film adaptation that director Denis Villeneuve has created. First published in 1965, Dune has been an influential text to many science-fiction storytellers over the years.

Here’s what he said:

"Duncan Idaho is a legendary warrior, noble guardian of the House Atreides, this family he’s sworn to protect. He’s the samurai, the frontline. He’s trusted by the Duke and is sent to Arrakis to be an ambassador for the Fremen. At the root of it, he would do anything for Paul. He becomes this one-man army standing between this extraordinary young man and the dark forces sent in to wipe out his bloodline forever."