Cuboid

/Cuboid (Also /z, /blb or /c) is a command which allows users to fill in a cuboid (3D rectangle) with a specific block type. This is done by typing in the command, and then marking the two corners, either by placing or deleting a block. If the block type is specified with /Cuboid, then the cuboid will be made of said block, otherwise it will be of the block the player is holding. /Cuboid can only be used once the user has reached Builder rank. Being a Draw command, /Cuboid is limited to how many blocks can be changed in one go depending on one's rank. The /Cuboid command can also be undone with the /Undo command.

Usage
/Cuboid can be used to make lines, flat surfaces (rectangles and squares), or three dimensional shapes (cuboids and cubes). For the below guides, references will be made to the image of the cuboid at the top of this page.

Line
To create a line, one could mark points A and B. A line requires that exactly one of the (x, y, z) coordinates changes. For example, two blocks placed at (0, 0, 0) and (0, 4, 0) form a straight line which would be 5 blocks in size.

Rectangles
To create a flat surface, points A and C could be used. Exactly two out of three coordinates change when drawing a rectangle. Therefore two blocks at (3, 5, 5) and (3, 12, 16) would form an 8x12 surface, 96 blocks in total.

Cuboids
Points A and D form a cuboid, since all three of the (x, y, z) coordinates change. If blocks were placed at (0, 4, 9) and (6, 11, 17), this would form a cuboid. The dimensions of the cuboid would be 7x8x9, and this Draw command would therefore have affected 504 blocks. If this had been attempted by a player at the Builder rank, the commands would not have been executed, as the Builder Draw limit is 256 blocks.

Restrictions
The size of the cuboid which one can make is dependant on one's rank: If a player attempts to exceed their Draw limit, there is no penalty, but the command simply won't execute. The player will be informed via an in-game message that they have tried to Draw more blocks than they are allowed, and will be reminded of their limit.
 * Guest: N/a
 * Member: N/a
 * Builder: 256
 * Crafter: 1,024
 * Engineer: 7,500
 * Architect: 15,000
 * Trusted: 30,000
 * Staff: Unlimited

Griefing
This command can also be used quite well for griefing. Using this command in this way can mean serious consequences. All information can be seen at http://crypticphoenix.wikia.com/wiki/Griefing#Un-needed_draw_commands.