Speed Miner

Once you reach Mining level 100, you gain the Speed Miner Ability. Now you can get a speed bonus for mining, simply by keeping mining for a while: To get this effect you need to use an iron golden or diamond pickaxe. As soon as you stop mining a block with the iron or diamond pickaxe for one second, the speed bonus will be removed again. Using a golden pickaxe instead will only require you to mine a block one every 3s, and the needed mining time will be halved.

Here you can get the command to install this module.