Charlie Hunnam's Once and Future King arrives with blade drawn in a 45-second teaser for director Guy Ritchie's "King Arthur: Legend of the Sword."

"I am here now because of you," Hunnam's hero says over the kind of footage that's precisely what fans of Ritchie's "Sherlock Holmes," "RocknRolla" and "Snatch" have come to expect. "You created me. And for that, I bless you."

The identity of the "you" being addressed by young Arthur is anyone's guess. It could be the people of Britain, considering  the character's place in legend, or that menacing helmeted figure. Or, you know, neither of those.

Ritchie's take on Camelot and Excalibur traces the journey of Arthur from a child whose father is murdered and birthright is stolen by his uncle Vortigern (Jude Law) to his rise to the throne of Britain.

Acclaimed filmmaker Guy Ritchie brings his dynamic style to the epic fantasy action adventure “King Arthur: Legend of the Sword.” Starring Charlie Hunnam in the title role, the film is an iconoclastic take on the classic Excalibur myth, tracing Arthur’s journey from the streets to the throne.

When the child Arthur’s father is murdered, Vortigern (Jude Law), Arthur’s uncle, seizes the crown. Robbed of his birthright and with no idea who he truly is, Arthur comes up the hard way in the back alleys of the city. But once he pulls the sword from the stone, his life is turned upside down and he is forced to acknowledge his true legacy…whether he likes it or not.

Opening May 12, the Warner Bros. film also stars Astrid Bergès-Frisbey as Mage, Djimon Hounsou as Bedivere, Aidan Gillen as Goosefat Bill and Eric Bana as Arthur’s father King Uther Pendragon.