Fortune Necklace

The Fortune Necklace is a common neck armor that spawns 3-6 coins at the start of every battle, but applies the Fragile status to the wearer. Fragile means the necklace takes increased damage or breaks more easily, so you're trading defensive durability for an economy boost. The coin output is front-loaded — it fires at battle start rather than being earned through play — which means you get the benefit regardless of how the fight goes.

This pairs well with anything that benefits from having coins available, including the Bandit Mask and other Thief set economy items. The Fragile downside is more significant if you're relying on the neck slot for defensive stats; it matters less if you're already stacking coin-generation and don't need armor there.