Three accurately aligned witch-hut floors alternate dry spawning and timed water flushes, with separated dispenser cells, independent repeater loops and a lethal dry collector.
At an existing Java swamp hut, three dark floors use the saved structure spawn volume. Five separated source cells on each floor flush witches into a lowered transverse trench. Every floor has a complete 42-repeater timer; its circulating button pulse toggles the five dispensers every 16.8 seconds. An open gate stops the permanent trench water above a dry fall exceeding 32 blocks, and hoppers collect the drops without fire or player kills. The model shows the dry phase with filled buckets inside the dispensers. This original adaptation is untested in game.