Euron Greyjoy made a big entrance in "Game of Thrones" season 7 episode 2. The sea battle in which the king of the Iron Islands killed two Sand Snakes (Obara and Nymeria) and captured both Yara Greyjoy and Ellaria Sands (plus another Sand Snake, Tyene), featured two details only book-readers would have caught.

The reason why Euron's ship is so silent

Euron's galley is called Silence for a reason. The ship is said to be infamous from Ibben to Asshai. Its decks are painted red to hide the blood that soaked them. The ship is crewed by mutes and mongrels, as Euron uses to spare a few captives from his raids and offers them to live as his crew, but cuts off their tongues.

Have you noticed how silently Euron's galley approached Ellaria's ship?

The huge vessel, silently emerging from the mist, is quite a dreadful sight for Yara.

You can notice the horrible mutilation Euron inflicts to some of his men in the scene below.

When Ellaria asks her captors to "get it over with," one of Euron's man creepily shakes his head. He looks like a man who had his tongue cut off. Remember what Euron said in "GOT" season 6 episode 2? "I am the Drowned God. From Old Town to Qarth, when men see my sails, they pray". After seeing what Euron can do to his enemies, we do understand why men pray when they see his huge, disturbing ship approaching.

Euron's axe backstory

As many book-readers noted, the axe Euron Greyjoy is wielding in "GOT" season 7 episode 2, confirms that some of Victarion Greyjoy's traits have been given to Euron.

Victarion is a relevant character in the "A Song of Ice and Fire" book series. He's the younger brother of Balon and Euron, a powerful man who wears plate armor in combat, a kraken-shaped helm, and a mighty axe.

Since the showrunners have chosen not to include Victarion in the show, a few aspects of the character are being incorporated in Euron.

Who knows, maybe we will notice a few more similarities in the next episodes of the TV series.

How Euron found Yara and the Sand Snakes?

Since a lot of fans are wondering how did the cruel Euron find Yara so quickly, we think a little explanation can be useful. As you can see from any map of Westeros, King's Landing and Dragonstone are very close.

When Euron set sail out of Blackwater Bay after his meeting with Cersei in the capital, his fleet was so close to Dragonstone that it was a child's play for him to spot the enemies' ships and track them down in the misty night. Simple as that.

Don't forget, the third episode of "Game of Thrones" Season 7, titled "The Queen's Justice" will air on Sunday, July 30, on HBO.