The two most discussed mysteries featured in the spectacular sixth episode of "Game of Thrones" season 7 [VIDEO] can now be explained, thanks to some eagle-eyed fans and to "Beyond the Wall" director Alan Taylor. We're talking about the huge chains appeared from nowhere at the end of the episode and the weird Longclaw-open-its-eyes scene.

Where the Night's King got those giant chains?

In Sunday's "Game of Thrones" episode [VIDEO] we saw the Night's King killing Viserion with an ice javelin and then turn the dragon into a White Walker by physically touching him just like he did with Craster's child in season 4. Many fans are wondering where the White Walkers found the big chains they used to drag Viserion out of the frozen lake.

Well, as recently reported by Uproxx, in the latest seconds of episode 6, just before the Night's King's resurrection of Viserion, we can see a barge that was used to ferry people across the water, a barge that uses chains, not poles (check the picture above).

So the Night's King apparently found the chains close to the place in which Viserion has died, and this is also (according to some fans) a clue that indicates that the Night's King may have orchestrated the battle to force Daenerys to fly north with her dragons. In other words, some fans think it was a trap.

Longclaw opened its eyes when Jon emerged from the lake?

In "Game of Thrones" Season 7 episode 6, the eye in the wolf head hilt of Jon's sword, Longclaw, appears to open when Jon emerges from the frozen lake. The Internet obviously went crazy over this detail, but apparently, it was unintentional.

A statement from "Beyond the Wall" director Alan Taylor recently confirmed that the visual effect was really caused by a droplet of water or a reflection. Taylor said that he hadn't a clue what fans were talking about.

"I'm going to have to go back and watch that moment close up and in slow motion to see what's going on there. I can say that there was no intention for that to be the case," Taylor said to Insider. Which means that Longclaw's pommel didn't really open its eyes when the King in the North came out of the frozen lake.

'The Dragon and the Wolf' official trailer

Don't forget! The last episode of "Game of Thrones" season 7, titled "The Dragon and the Wolf," will air on August 27, on HBO. The official description of the next episode of "Game of Thrones" hasn't been released yet, but you can watch episode 7's trailer below: