Inspired by ExtraHardMode:
https://www.spigotmc.org/resources/extra-hard-mode.19673/

This plugin want to inhibit the " tunneling method" by adding extra cost in durability when breaking " hard " block.

Can be configured with the config.yml.

I recommand to use this plugin, only if ExtraHardMode isn't compliant for your project.

If you find a bug or want to help me in anyway (Like wrinting this descriptions) i let you create an issue here:
https://gitlab.com/jumperdenfer/hardmining