Grindstone

A vanilla block. Feedback keeps its old use and adds a new one.

In vanilla

Right-click it to open a screen. It strips the enchantments off an item (giving back some experience) and combines two damaged items of the same kind into one with more durability.

In Feedback

Everything above still works. On top of it, the grindstone is where you regrind the edge of a tool or weapon:

• Sneak and right-click the grindstone with an edged tool in hand.
• The edge steps to the next choice: keen, standard, blunt. Keen bites harder and chips sooner; blunt is tougher.
• Each grind costs 2 points of durability, and never the last one.

The cost is the point. Without it an edge would be a free toggle (keen for the dig, blunt for the walk home), and a choice that costs nothing isn't a choice.

Any block in the #feedback:grindstones tag works, so a modpack's grinding block can join. Only things with an edge can be ground: bows, shields, maces and armour have none.