Minecart with Command Block

The Minecart with Command Block is a Command Block inside a minecart, having the combined functionality of both. It can be activated by powered Activator Rails.

Obtaining
Much like regular command blocks, the minecart with command block is only obtainable using (using "minecraft:command_block_minecart") or external tools. It can also be obtained through, like the other different types of minecarts can.

Usage
The minecart with command block is used to run commands and travel. It can be more useful than a Command Block in some situations, and less useful in others. For an example, a benefit of command block minecarts is that you do not need to give it input from a Clock circuit; for as long as it is powered, it will repeatedly run the command, once every four game ticks (five times per second). The minecart with command block gives a comparator output when it goes over a detector rail.

Trivia

 * Minecarts with Command Blocks will repeatedly execute their command when on a powered activator rail, unlike the regular Command Block which executes its command only once until it is powered again.
 * The Minecart with Command Block is the only Minecart that has an item that cannot be crafted using a Minecart and the respective block.