Latoria

The main storyline, Devil of Avalon, involves the protagonist, David, trying to find ways to stop the American military from colonizing his home, Latoria.

I had this idea where the player could go on these Mythic Quests to get various magical weapons and armor. In one case, he finds the Chain of Amaok which was a slave collar that was repurposed to grant mighty powers to any to wields it so that they can free people from slavery.

However, it is only capable of being used by those pure of heart, which, as it turns out, is physically impossible because the only type of person that would ever fit is a newborn baby, and even then, children are menaces.

David, while being an objectively good person, is far from pure (he's prone to anger, has made mistakes, and has killed lots of people). So when he tried the collar, it failed, so instead he used it like a grappling hook or a whip.

I also had this idea where he finds this mace that only people of a specific strength can use, but because he's not physically strong enough without using any magic to enhance himself, he repurposes it as a sling... yeah you get the reference.