Jewels which may be inserted and taken out of swords, picks, and other tools. The jewels would add different powers to the sword and or player e.g the jewel of sand, when inserted into a shovel would allow the player to break one sand block and a radius of 4 by 4 sand blocks would automatically break. When inserted into a sword, the player deals 50% more damage when standing on sand... Water jewels when inserted into a helmet, allows for underwater respiration. When it is inserted into a pick, the pick will break normally underwater. There are many possibilities for this idea. Thank you for listening.