Spectre Paint Roller

Painting walls is the slow part of decorating because you have to stand beside every single tile. A few extra tiles of reach sounds minor until you are coloring the back of a three story build and can cover a whole floor from one spot instead of hopping between platforms. It pairs with the Spectre Paintbrush, which does the same job for blocks.

It cannot be reforged, so no modifier will ever improve it. It also arrives absurdly late for a decorating tool, well after Plantera, by which point most of what you wanted to paint is already standing. Anyone planning a big late game build should set aside the bars for this rather than pouring every last one into armor. It still needs paint in your inventory to do anything at all.