Effect
Allows you to open locked chests and hidden doors within dungeons. Normally inaccessible locked objects become available, giving you access to rare gems, coins, and special items that are exclusively available behind locks. Despite being "rusty," the key functions reliably on every locked mechanism in the game.
Location
Found in the Underground Dungeon area, a mid-game region. Secure this relic when you encounter it — the payoff from unlocked content accumulates quickly.
Rating: ★★★★☆
A consistent resource-boosting relic that adds a reliable extra income stream to every run. Locked chests regularly contain above-average rewards, and the hidden doors they open sometimes lead to bonus areas or special events. The relic's value scales with how many dungeons you explore per run — more dungeons mean more locked content to unlock.
Strategic Value
- Pair with Rilevatore to see locked chest locations on the minimap — this combination ensures you never walk past a locked chest without knowing it
- Hidden doors can lead to bonus event areas with unique rewards; always open them when this relic is in your possession
- Rare gems from locked chests accelerate your build when combined with Gem Hammer and Stardust Anvil — the unlock chain from these three relics is a core resource engine
- Make it a habit to stop at every locked object in a dungeon when carrying this relic; the marginal time cost is almost always worth the contents
- Pairs with Guiding Light as well — after unlocking chests, any light-source items that drop can be efficiently swept up without additional backtracking