the True King of the North a new ride
Undead dragon. Oh yes, that's the way to get over the pesky wall. The Winter is coming to South.
Wouldn't it have been more effective to take Cersei out for a direct look at what's coming for her?
No. I don't think so. Remember Cercei has her Undead Mountain, so in a way she already knows that beyond the wall are the realm of the dead. But as long as they cannot cross the Wall, it's all good. No problem. She can sit on her Throne and plot ways to keep it, since everyone, including her sons failed to keep it.
I was really hoping Arya was playing Littlefinger, but it looks like perhaps not.
Arya is playing a game with Littlefinger. She's installing fear through Sansa, because I'm pretty sure Sansa will reveal him that there's a Faceless assassin in the Winterfell. I don't think she's that interested on taking Sansa face and "feel what's it going be like to wear to pretty dresses."
All the things she said needed to come out or otherwise it would have turned her. And that twist isn't good, because she's already losing her identity to the Faceless God. Jagen asked her: "Is this what girl really wants?" and she answered: "Yes."
Back then it was of the revenge, but for now it is because she's belongs to that God. Or should I say she's a champion or a living avatar for her god. One that could possibly kill the Night King as in theory she could be able to wear a face of the dead or get close enough to sink that dagger in his heart, and thus save the world from the everlasting night.
How powerful is dragonglass?
Very. It killed the dead straight and in theory they could easily facet bolts to mount scorpions, ballistas. They could even facet sling bullets and use them to wreck havoc in the undead army. From what we have witness a sling storm could possibly be the most effective way to dispose whole threat and there would be nothing that Night King could do about it.
The dead has big disadvantage in the fact that they dispose and then become skeletons. Zombies are much more resilient as they have skin and flesh to protect those precious bones. I wish Gendry would have made his warhammer from dragonclass as basalt is hard stuff to machine. That hammer head however is much easier to manufacture and there's enough of big men in the north who can wield it effectively.
Problem is as you presented it the mining operation. They really need it to step it up, because I don't think Dany will sacrifice another dragon to the dead. Maybe they could search for more eggs to make a dragonlance battalion for the queen.
I personally loved seeing the North and hearing that there three things to keep men warm. The banter between the character was perfect and it fit in that serenity. It is lethal to believe you can survive there, because every moment out there is costly. Even to our technology as the fact is cold halves the battery power. Machines has to work harder or longer and therefore consuming more resources to keep them simply warm.
What I don't understand is how the brotherhood turn their swords to a flaming models? How does it work and why it didn't work that well on the dead? The undead bear caught fire as soon as the sword hit the belt, but not the foot soldiers. The science behind this is that cold wind dries flesh. All those dead men should have burst flames as soon as they caught the men standing on the rock. But they didn't. They cindered. Some of them showed flames, but it did caught up those other ones.
The surprise to me was how effective Long Claw was on disposing the walkers. It was even better than those basalt daggers Sam used to slaughter the white walker. In fact, so far, it has been ever better to dispose the dead than the dragon breath! Against the Lanister army the breath was lethal, almost napalm like, but against the dead not so much.