UHC stands for Ultra Hardcore: the difficulty is set to hard and natural health regeneration is disabled. This means that you must rely on potions, Golden Apples and beacons to heal up! Additionally, raiding and griefing ARE allowed in this corner of the Creeper's Lab. Dying will kick you out for a week, so be careful out there.
A small, protected area is available around the spawn point. Beyond that, you're on your own!
Your goals for this challenge are the following:
Each successfully completed task is worth 5 Merit Points.