Using this skill makes the Hunter drop a decoy which holds the aggro of enemies. It has no morale so it cannot die, but it will explode after 15 seconds, damaging your enemies.
This skill can be used to increase the Hunter's surviveability as enemies will not attack you. If the enemy is attacking the Hunter, the enemy will generally attack the decoy after 1 or 2 further hits on the Hunter. When the decoy disappears, the enemies will continue to attack the Hunter.