THIS PLUGIN NEEDS THE CommandPanels PLUGIN TO WORK!
YOU MUST ALSO EXECUTE THE FOLLOWING COMMAND TO DOWNLOAD THE GUIs: /cpe confirmGamble.yml bftzWepGPINljl8F1h39N6ZJ5dH2 e880efda-60de-47f2-90eb-9e3a9c05c3ad
This dumb plugin opens a "Gamble" GUI every time you mine an ore. It contains a hidden item randomly chosen between: Diamond Pickaxe, Diamond Sword, Golden Pickaxe and Golden Sword!
You must bet on what item you think you will see. Guessing the correct Tool or material gives you 2x the normal loot drop. Guessing the exact item gives you 4x the normal loot drop. If you guess incorrectly you don't get anything but XP from mining the ore.
CommandPanels:
https://www.spigotmc.org/resources/commandpanels.67788/