Euron Greyjoy (Pilou Asbæk) boldly declared to Queen Cersei Lannister (Lena Headey) in the first episode of "Game of Thrones" season 7 that he can win her trust and favor. He promised her that he will bring her a "priceless gift" and it was finally revealed in the show's most recent episode Sunday.

Euron Greyjoy's crew violently abducted the Dorne mistress, Ellaria Sand (Indira Varma), and also killed two of her daughters. Euron obviously had a plan to present Ellaria Sand to Cersei Lannister as a commitment to his allegiance, or win her in marriage, as well as render the justice Cersei needed.

Why is she the priceless gift?

Viewers might recall that Ellaria Sand had Cersei's daughter, Myrcella Lannister Baratheon (Aimee Richardson/Nell Tiger Free), at Dorne since the early seasons. Myrcella was betrothed to House Martell's Trystane, at a time when both kingdoms were still in good terms.

Ellaria Sand, however, had Myrcella killed in retaliation for the death of her lover and Trystane's father, Prince Oberyn Martell (Pedro Pascal), under the Lannisters. Cersei Lannister was devastated about Myrcella's death, especially since she also lost her other children, Joffrey (Jack Gleeson) and Tommen (Callum Wharry), under dire circumstances.

What will accepting the gift mean?

A preview for the next episode of "Game of Thrones" shows Euron Greyjoy feeling quite upbeat and sure of himself.

He's riding the streets of King's Landing while dragging something or someone by the rope, which most likely is Ellaria Sand.

Speculations are that Euron Greyjoy's gesture will have Cersei Lannister saying yes to his marriage proposal, thus making the alliance of the Seven Kingdoms stronger with their combined armies. But this might also mean Cersei Lannister will be abandoning her lover and twin brother Jaime Lannister (Nikolaj Coster-Waldau).

Will this be reason enough for Jamie to kill Cersei himself?

What kind of a threat is Euron?

Before “Game of Thrones” season 7 started, Pilou Asbæk told Digital Spy this his character is not 100 percent evil like previous villains, Ramsay Bolton (Iwan Rheon) or Joffrey. Asbæk described Euron Greyjoy as more of a hooligan.

But Euron Greyjoy is still dangerous because he shows a different side, depending on who he’s with or who he’s facing.

“The guy you met on the bridge is not the guy at the Kingsmoot,” the actor said, adding he also has a different demeanor when he’s with Cersei Lannister.

Because Euron Greyjoy is different with every people, he’s a lot more difficult to predict. To his enemies, that’s not a good thing and this makes him an even bigger threat than the other evil characters on the show.