An ornate longsword that is easy to use but also reminds the wielder of its use.
Demon hide Whips that will punish the wielder for injustices.
A magical one and a half handed longsword once wielded by an innocent child forced into the horrors of combat.
UPDATE: Fixed a few flaws to balance the weapon some more and filled a plot hole.
UPDATE: Decided to change the end of the story to have a more fitting reward for a war hero. But the tale still takes a tragic turn.
A small, primitive village has yet to discover fire, which is a good thing because there are highly flammable (but not otherwise dangerous) gasses in the air. The heroes, blissful in their ignorance, don't know that and think it a wonderful idea to show the locals open flame.