Bored of your standard minecraft gameplay? Try these 10 challenges to make your game more exciting with one single command.

10 Challenges:

-Lava Curtain
-No Items
-No Coal
-No Water
-No Dirt
-No Trees
-Fire Trail
-Explosive Rain
-Double HP Mobs
-Weakness

You can play one challenge at the time, you can combine challenges, you can do whatever you want. This Command works in 1.9 only.
Note: Do not do this challenges in your favorite save, since it can cause serious damage to the terrain and builds.
Note: Still in testing process.