linn

four kinds of big, cascading water carved into the overworld at the surface step, so each one crosses vanilla's own rivers and terrain rather than replacing them: a tarn in a high mountain valley, sinks in its floor sometimes opening into a flooded cave beneath; a reach winding wide through plains and forest, a weir every stretch making its own still pool; a gill cut narrow and deep under dark canopy; a spate stepping fast down through ice and snow, blue ice on the bed so the lane down the middle still reads deep. cascading is the shape all four share — a ladder of still pools joined by falls, and a fall is the only place any of it actually flows.

every pool is built oversized on purpose: 128 or more connected source blocks, 4 or more deep, double what a works headgate needs to go live at all. and every fall has a neck — a stone pinch narrow and high enough to wall — so a linn is never short a dam site, only short of which one to build first. no items, no blocks, nothing to craft: linn hands works a pond already deep enough and full enough, and gets out of the way.