Place it at the very start of a battle scene, then follow it with Metal Pipe Clang as weapons meet, and close with Dramatic Dun Dun Dun when the enemy leader is revealed.
About this sound
A long, low brass blast lasting about twelve seconds, beginning with a low growling breath and building into a harsh, forceful roar. It feels ominous and threatening, shifting a scene from calm to alert as if an army is approaching. The effect is inspired by the dark fantasy horns used in Dungeons and Dragons campaigns to signal battle and danger.