So my friend watched this video that had this exact scenario, and wanted to try it out, but it costed money! So I made it myself. Please report any bugs or suggestions in the comments.

To become a worm, do /team join worm

The worm can mine practically everything at a ridiculous rate, but starts to die when exposed to the sky for 15 seconds. It can "eat" coal ore, iron ore, gold ore, redstone ore, diamond ore, nether gold ore, quartz ore and obsidian to gain various buffs. It has infinite lives, and you can choose if keep inventory is true. Yes there can be multiple worms.

The player (or players) must kill the ender dragon and beat the game. There are many player trackers already made so go and download those.

Inspiration: https://www.youtube.com/watch?v=cW7U8PfPZjY