AOSO VEINMINING

 Hold a key and break a block: the whole vein, a 1x2 tunnel or a 3x3 goes with it.
Hold the grave key (`) and mine: every connected block of the same kind breaks with it, up to 64, ore and deepslate ore together. Scroll while holding the key to switch to a 1x2 or 3x3 tunnel. What will break is outlined, with its count under the crosshair. Each block wears your tool (never breaking it) and costs a little hunger, and protected land is respected. Drops gather where you struck. Settings are in the server config.