If you're watching this, congratulations, you made it. Have a cookie. This is the last area, and it's apparently in the back of this thing.
Don't trust any sand
It nearly ends in the first minute. The sand gives way over lava, and they're glad that worked out, because dying at the very start of the recording would have been really unfortunate. Lesson learned: don't trust any sand. Nobody brought blocks, which doesn't help.
A junction leads to a rail through a tunnel of rainbow wool. They might have been here before. Probably they skipped a lot of the wool level area back then. The rail turns out to be a shortcut back, which is cool, and there's wool lying around, so they grab some to make a bed and change their spawn. There are boats, too, for a little Super Mario Kart.
Is that a gigantic dragon?
The final area opens with lava and coal for days. Then: is that a gigantic dragon? Yeah. It's awesome. Scoti avoids a sand trap on the way in, because Basket told him to watch out for sand. A poison spider trap gets blocked up and left alone, and the bed goes down nearby.
The guess is that the wool is in a box up above the dragon's head. One of its eyes is green, so there's probably an emerald in there too. Something tells them the intended path is down to the tail and then up along it. One of them admits he had to look online to find where this level even was. Kind of cheating, but otherwise there would have been something like 30 episodes of them wandering.
A spawner on every spine
Each spine of the dragon has a spawner. So far they alternate, magma cubes and skeletons, a bunch of doodads on his tail. The dragon would look a lot cooler without them. There's gold and diamonds on its underside. With Knockback on a sword and Punch on a bow, they have to be careful not to knock each other into the lava. A torch on a spawner isn't enough when everything around it is dark, and magma cubes are deceiving. They look like harmless slimes, but these ones set you on fire, and in crowds they're a real pain.
Blazes aren't affected by light either. One takes the spawner up top, the other the blaze spawner. Spawners go down one by one, with plenty of retreating to eat chicken in between.
How am I not dead
The obsidian takes forever to dig. At one point one of them is inside one of the spikes. A ghast spawner sits way up at the very top, so he pillars up, and it goes down too. Then a lot of blazes, right behind one of them. How he is not dead right now, he does not know. He retreats on fire into a little hole, which puts the fire out, and that's the episode.