They pick up right where they left off, inside the barracks with the ceiling now closed off. The death counter reads 4 for Scoti and 2 for Basket. By the five-minute mark it reads 7 and 3. This is the episode where they go for the first crystal, and for a few minutes they're sure they've wrecked the whole map.
Straight for the box
There's a staircase going up and outside, and one of them kills a spawner so nothing can come at them from behind. The plan is simple: charge in, light it up, and run straight for the box. The room is full of Corrupted Soldiers, some of them on fire, plus creepers. "Oh yeah, lots of them."
It goes badly. Scoti is slain by a Corrupted Soldier, the retreat stalls, and something blows up the box. "Whatever was in there." Someone digs in to grab the white wool, only to realize the floor of the box was white wool and the crystal was the thing inside it. "I'm dead again." Scoti dies twice more in the next couple of minutes, once to another soldier and once from a fall.
"I think I ruined the map"
Now the crystal is nowhere to be seen. "I don't see the crystals. I think they're gone. I think I ruined the map for us." Whoever is talking is down to one heart with no gear and heads back to base. "I'm so mad at myself right now." Soldiers somehow get over the wall, and Basket is slain by a Corrupted Soldier too.
They talk it through. If the map uses command blocks to check for the right item, they might be stuck, but either way, "we're not gonna restart the map." The lost stuff should be just to the right of the steps up to the box, where its owner died. It isn't there at first. Then it turns up back in a corner. "I got it, I got it, I'm running." The White Crystal survived. "I was so worried that I'd ruined it for us." A week after finding their own heads in the Shrine of Heroes, they had almost lost the first crystal.
Creeper traps and a secret room
On the way out one of them works out what the room is for: break a block on the bottom of the hallway across the way and it spawns creepers all through the room. A secret room turns up a Power I bow. They split up to regroup at base, then head back in to finish the floor. "We've confirmed the white crystal survives in spite of all of my attempts to ruin us."
Emerald and armory
A creeper spawner goes down, then a skeleton one. There's an emerald up the stairs, and they remind themselves this area has nine of them. The soldiers drop chainmail pants, so they think about keeping one of their spawners as an armor farm. Up in another building, a sign reads "Armory": armor stands, leather armor, swords and arrows. They have too much to carry already, so that's the end. "Success. We got the crystal."
Nothing goes on the monument yet, so the count is still 0 of 16 crystals and 0 of 12 emerald blocks.