The crowbar tool can break spawners and drop the spawner item on ground by right clicking on a spawner.
Optional Sections
There are some optional sections that can be used with this tool.
commands-on-use
List of commands to be executed when using a crowbar on a spawner.
You can use the following placeholders in your commands:
%player% for the name of the player that broke the spawner.
%entity% for the spawner's entity type.
