They called it the Marsh "builder" MellowMan destroyer of worlds.... use at your own risk, before they removed it.
Here's a tip, place one block, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another, then another see you can emulate what a builder does