Haste Instamine

Haste Instamine is a 100% server-side Fabric mod: players don't need to install anything. It marks specific blocks so they break instantly, but only if the player has Haste II and a suitable tool; without the effect, blocks behave exactly like vanilla, respecting drops, Silk Touch, Fortune, tool durability and experience gain. By default it includes deepslate and every stone and deepslate ore, expandable via in-game commands with tab-completion that detects blocks from other mods and if you are in Hardcore mode you can acces via folders.