AOSO: Building Wand
Five building wands that lay whole layers of blocks at once, up to 50 at a time, in survival or creative.
How it works: sneak and right-click any block, and the wand builds with that block. Right-click a face of a block, and a layer of your chosen block is laid over that face, across every block of the same kind joined to the one you clicked, up to 50 blocks. To change the block, sneak and right-click another one. Before you click, a see-through ghost shows exactly where the blocks will go, and a line under the crosshair says how many will be laid.
Survival: the blocks come from your inventory, one for each block laid, and each block laid wears the wand by one point. Golden wand 200 blocks, iron 600, emerald 1200, diamond 2000, netherite 4000 (and it does not burn). Repair a wand at an anvil with its material, or enchant it with Unbreaking and Mending. In creative it costs nothing.
Crafting: a gold ingot, iron ingot, emerald, diamond or netherite ingot at the top right, and two sticks running diagonally down to the bottom left.
Blocks are placed as if you placed them yourself, so stairs and logs face the way they should, and claimed land and other mods' protections are respected. Doors and beds can't be built with a wand.

