This mod adds a couple of thinsg to minecraft.
1. A corrupted biome.
This biome is not rare and can be found pretty easily. It is made up of textureless blocks. Upon entering it, you get an achievement and unlock new recipes.
2. The Prototype Mob
This mob is a flying biped entity that will attack you on sight. It drops a bedrock block upon death.
3. The Command Mob
This mob is a slime with a hitbox larger than it's actual size. It moves extremely fast. Upon death, it drops a command block
4. Corrupted plant
This generates next to water and can grow up to 5 blocks tall. It also has no texture. When broken, it drops Error404 which is food.
5. Food
This food fully replenishes hunger and gives lots of saturation, and alo gives 404 levels when eaten. I takes 200 ticks to eat.
6. A custom dimension
This dimension is a combinations of the end, stone beaches, nether and the corrupted biome.