Legend of the Guardians: The Owls of Ga'hoole

During some missions, you can use hot coals to destroy objects or to light torches. These are usually found on little pedestals or carried by allies. You can also use these coals against enemies by targeting them and pressing  when the prompt appears. However, if you want to wait to get this, there is a boss that can only be damaged by attacking him with hot coals. So, you'll get this trophy eventually, without going out of your way for it.