Daredevil Mode

Small Concept: Sure it is the impossible difficulty I can think of. There's differences with mobs. They do instant kill. Make a competitive leaderboard for it. All mobs are sun resistant and do damage against doors and pistons. Being AFK is not your friend. Natural Regen will be permanently disabled.

Everything with regular damage:

• Fall Damage (Reactions would be hilarious without it)
• Hunger Damage
• Poison Damage
• Harming Potion (PvP only)
• All PvP Damages