Features
✔ Upon killing a player you gain a heart and they lose a heart
✔ Dying by any other means makes you lose a heart
✔ When a player reaches 0 hearts they are eliminated/banned
✔ Adds 2 new items: Heart Container & Revive Crystal
✔ Crafting recipe can be changed by using a datapack or modifyng the item's json files
✔ Right-click the Heart Container to get an additional heart
✔ Revive Crystal can be used to bring back a player / unban a player that has lost all their hearts
✔ Command /retrieveheart to get one of your hearts as a Heart Container item
