Ice Brick

Ice brick is the version of ice you can actually build on. Raw ice is slippery and snow brick throws snowfall particles around your build; the brick drops both of those and behaves like any ordinary material while still reading as ice at a glance. That makes it the right pick for floors, stairs and platform runs inside a snow base, where sliding around your own house stops being funny after the first hour. Save the untreated blocks for spots where you want the slide as a deliberate hazard, and brick everywhere you have to stand still.