The water witching stick
You place your source block within your plot. In order to advance your flow you need to whack the ground with the water Witcher and if it’s a space that the water would normally flow than it dose so one space. You can never advance the flow out of your plot if you remove the plot the water is subject to world regeneration and can no longer be advanced. Any adjacent plot would need to use there own stick to invite the water into there plot.
Water would be a mid tir skill and lava an advanced skill.