The final boss of the dark room will always be the lamb.
Is therea shop on the final floor of greed.
Throughout the wasteland you cross bridges and fall down in deep ravines to reach to the castle.
The greed donation machine appears after every ultra greed fight in greed mode or greedier mode upon touching the greed donation machine isaac will donate a coin causing the displayed coin total to increment.
Wy10 lfv4 greed mode start with isaac and play normaly until you get the d100 and reroll until ipecac and abandon it after blow up statues until one give steam sale when you get swallowed penny abused the blood donation machine until it breaks and give the iv bag buy 1 red heart 2 gold and used the iv bag and buy everything it will be a light show after.
After beating the lamb for the first time a golden door will appear in the starting room of the dark room floor.
A super secret room is also connected to one of the rooms.
Similar to the donation machine the amount of coins donated will persist between all greed mode runs donating money to the greed donation machine unlocks achievements and items.
Desolate dunes was released in the version 40 update and is the fifth floor in swordburst 2 this floor is given to players when they defeat irath the lion it has a desert canyon theme similar to floor 5 in swordburst online yet ironically contains little to no actual sand.