None can be certain who created this weapon. Some say the gods gifted this to mortalkind as punishment for those who would purchase power. Some tales attribute it to an exiled artificer seeking revenge on a king. The truth is perhaps simpler: a dragon with an insatiable need to gamble her hoard.
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Maw of Avarice
Weapon (shortsword), uncommon
Golden Compass. While you wield this weapon, you can use an action to speak its command word and instantly learn direction to the wealthiest creature within 60 feet of you. Once you use this action, you can't use it again until the next dawn.
Gilded Hubris. Immediately before you make an attack roll with this magic weapon, you can insert up to 10 gold coins into the hilt (no action required). If you hit your target, the weapon returns half the coins inserted for the attack. If you score a critical hit, the weapon returns all coins inserted for the attack and deals extra weapon damage to the target equal to the number of coins returned. Unreturned coins are absorbed into the weapon.
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DESIGN COMMENTARY
There needed to be at least one item in this theme capable of consuming your gold. This design was pretty simple after that; high risk-high reward. It should feel easy to use for wealthier players.