Just enter the below command in a command in a command block, set the settings to repeat and always active and boom! The ultimate hole maker is born. This can also be used as an xp farm. After youve had enough, destroy the command block and go in the hole to collectyour xp! Disclaimer: it wont make a complete hole. Bedrock will still remain. Put the command block on a high pillar for best results.(Tip: You can swap the tnt minecart for any other summonable entity. I sometimes makes infestations of certain mobs with this command.)