So I was playing with friends on a hard challenge and I was thinking that it'd be cool if it was a speedrun category. Here's the challenge: 1.7.10 Adventure Hardcore

-> You can't mine anything excepted grass for seeds -> During daytime: you need to kill animals to farm food -> During nighttime: get a creeper to explode near a tree to get wood -> Game really starts when you get your wooden axe to get wood. -> No tower strats for endermen (Hardcore, so you can't respawn)

And of course, it'd be Any%: run ends when you kill the EnderDragon. What's cool about it is that it'd make you play with RNG based on the biome you spawn, mobs, structures (or not) and of course the creeper luck.