Minecart with Command Block
minecraft:command_block_minecartThe Minecart with Command Block is a creative- and command-only item that fuses a minecart's mobility with a command block's ability to run console commands, executing them at its current position as it rolls along rails. It cannot be crafted and has no survival-mode acquisition path.
FAQ
How do you obtain a minecart with command block?
Only through Creative mode inventory (Operator Utilities tab, cheats enabled) or commands such as /give or /summon; it has no crafting recipe.
How often does it execute its command?
When powered by an activator rail, it executes its stored command once every four game ticks.
Can I read its output with redstone?
Yes, placing it on a detector rail wired to a comparator outputs a signal based on the command's success count.
What happens if I break it?
Breaking it only drops a regular minecart; the command block itself is lost and cannot be recovered.