@Sulk sensor999 Here is the wither. It is a boss. If you want more information google up Wither instead of wasting your time here waiting for an answer.
Lol in my main world, the time i beat wither i trapped it in obsidian and it blasted through and im like "oh it" and then i run to obsidian panic room and it blasts through that and then i ran and ran and ran and ran