I like messing with my players sometimes so I did one where it was a sword that felt like there was incredible power waiting to be awakened. But that was it. The enchantment was just to make it seem powerful. Those were some fun sessions lmao
Real answer is a combat oriented version of the deck of many things. A player was a rogue gambler with a bunch of luck based rng stuff so I figured it'd be a good fit and it was really fun.