MH$

By MinePokemine

This Spigot/Paper plugin adds a currency called MH$ to Minecraft. It works like any other currency. You can use it with any mods that work with currency.

It's not a normal currency, though. Each MH$1,000 (or whatever you change it to in the configs) you have is a heart you have. When one player kills another, the killer get MH$1000 (again configurable), and the victim loses the same amount.