# Build

A hand-held builder. You load it into a CAD and fire; it builds with the blocks on your hotbar, picked at random and weighted by stack size, taking each block from your inventory first so your hotbar palette stays full.

- **Build Block** places one block against the face you aim at.
- **Build Line, Wall, Box, Stairs, Disk and Dome** take two shots. The first plants a small anchor circle; while your CAD has that level selected, a white box shows what the second shot will fill. Fire again at a block, or into the air, to build a **line**, a **wall or floor** (always flat), a **hollow box**, **a flight of stairs** as wide as your two corners, a **disk** or a **dome**. The first shot costs the mana; the second is free.
- **Right-click the anchor** to turn it light blue: the second shot then **carves** the shape out instead, and the blocks go to your inventory. Press the cast key on an anchor to remove it.
- **Build Vein** replaces a whole vein of one block with your hotbar blocks, the mined blocks going to your inventory.
- **Build Flood** fills the hole or pond you aim at from the bottom up.
- **Build Shelter** seals you inside a 5x5x5 box of crying obsidian, no obsidian needed. Crying obsidian stands up to withers and explosions.

Every shot changes at most 512 blocks. To copy a whole structure and build it again somewhere else, use [Blueprint]($circles/blueprint) instead.

| Circle | Mana (cast) | Shape |
|---|---|---|
| Build Block | 200 | block |
| Build Line | 200 | line |
| Build Wall | 200 | wall |
| Build Box | 200 | box |
| Build Stairs | 200 | stairs |
| Build Disk | 200 | disk |
| Build Dome | 200 | dome |
| Build Vein | 200 | vein |
| Build Flood | 200 | flood |
| Build Shelter | 200 | shelter |