The Ravager Warlord is one of four "Boss" opponents. The Warlord is moderately weak to fire, but otherwise difficult to hit. He has three health points, making him difficult to beat in single combat. If you do manage to defeat the Warlord, you will gain a "relic".
Relics are unique Salvage items that can be stored next to your character card, and do not take up "hand" space. The Warlord's sawed off shotgun might just be worth the trouble. using it (discarding it instead of rolling to attack) gives you a four in six chance to Insta-Kill an opponent (even other bosses unless otherwise stated).