Last level, one of them announces, back in the throne room in Death's March. By difficulty they are doing the areas a little out of order, but the map is open, so any order is allowed.
A bridge made with pistons
The start is a supply run. More arrows, twelve spare torches, eleven golden apples, and two pistons dug out of the last chest. The episode is barely going when the chat reads Scoti_Garbidis was shot by Skeleton, then that he fell from a high place. The bed is close, at least.
The pistons go into a bridge. One of them builds a slab walkway with a railing and uses a piston to push it out over the drop, as far as a piston will push, so the other can build on from the end without leaning out. Intuitive Pistons, someone decides, would be a good name for a Minecraft tribute band.
Blazes in the pillars
The blazes are coming from spawners up inside the tall pillars, so they work along the ceiling and dig down onto them, one tower at a time. One dig comes out right where the next spawner was. Arrows run out, so somebody runs back through the blazes to the chest at the start for more.
Somebody in the chat dares them to fight every mob and then spawn a wither. Not today, and probably not on this map.
Saved-up TNT
The middle of the room is a platform crowded with endermen, with charged creepers and witches spawning nearby, and something sealed under it. Basket has been saving TNT for a while and goes to work on it. The fuse goes early, because the lever was already on, but it blows. Under the blast there are what look like eight layers of glass, and a sea lantern in a small room.
Room of death and horribleness
Jumping down there is Scoti's mission, if he chooses to accept it. The chat reads Scoti_Garbidis was slain by Spider. On the next try the plan is to pour water in to wash the mobs out first, and it works a little too well: Scoti_Garbidis drowned. Down there, he reports, is a room of death and horribleness, a cube just like the ones that hold wool.
So he goes in once more, blocks up the ceiling to keep the water out so he can breathe, and looks around. There's a chest. There's a wool, and going by the episode title it's the black one. Then he blocks it back up in case something blows.
Into the ender chest
They retreat to secure it in the ender chest. There's still more to this level, including a hallway they never finished, but most of Scoti's gear got destroyed along the way. On the way out they clean out the chest: an Efficiency book, chain boots, arrows, andesite, bricks, gunpowder, flint and feathers, and the anvils, which get moved somewhere better.
