A modifier key multiplies the AM weight of the chosen safe. Keys aren't sold — they come from challenges and AMA2 locks, so they are the cheapest weight in the game. What matters is applying a hot key in time and picking the right safe.
How to apply
- Open Modifiers and click "Apply" on a key — or "Modify" in the safe menu.
- Choose a safe: the dialog shows the weight before and after, including the cap.
- Confirm. The key is used up, the safe weight changes for good.
Keys apply only to real (not demo) safes.
How much weight a key adds
A key adds no more than two new safes of the epoch would. So on a safe of up to 2 × 35 = 70 AM the key works in full, and on a heavier safe the gain stops growing.
Hot and eternal keys
The stronger the key, the faster it "cools down" — the lifetime of an unused key:
| Key | Lifetime | Eternal → | Price | Gain cap | Works in full up to |
|---|---|---|---|---|---|
| ×1.1 | eternal | — | — | 7.0 AM | 70 AM |
| ×1.25 | eternal | — | — | 17.5 AM | 70 AM |
| ×1.3 | 60 d | ×1.06 | 15 AMA2 | 21.0 AM | 70 AM |
| ×1.5 | 45 d | ×1.1 | 26 AMA2 | 35.0 AM | 70 AM |
| ×2 | 30 d | ×1.2 | 51 AMA2 | 70.0 AM | 70 AM |
| ×2.5 | 24 d | ×1.25 | 64 AMA2 | 105.0 AM | 70 AM |
| ×3 | 20 d | ×1.25 | 64 AMA2 | 140.0 AM | 70 AM |
| ×4.5 | 14 d | ×1.25 | 64 AMA2 | 245.0 AM | 70 AM |
| ×7.7 | 10 d | ×1.25 | 64 AMA2 | 469.0 AM | 70 AM |
- Expiry. An unused hot key burns at the end of its last day; you get a reminder 3 days before.
- Make eternal. A hot key can be made eternal (the "Make eternal" button on the key): a fifth of the bonus remains, from ×1.05 to ×1.25 (×2 → ×1.2, ×3 and stronger → ×1.25). It can't be undone.
- The price of eternity is a quarter of the showcase price of the weight the eternal key can add, at least 10 AMA2. It is shown in the table and in the window before you confirm.
- Account level adds +1 day of life to new keys and +2% to the cap per level.
Level key
A special key: it does not multiply weight, it gives +1 level to any of your safes for free, like an upgrade for AMA2, only without paying. Its card says "+1 lvl".
- Where to get it: the safe of luck and challenge rewards: 10% of rewards come as a level key instead of a weight key.
- How to use it: "Apply" on the key in Modifiers or "Upgrade" in the safe menu. It does not take the weight key slot: a safe that already has a key can still get it.
- Limits: the safe must be below the top level of its class; the key is valid for 30 days and cannot be made eternal.
Growth key
Makes one safe grow faster forever: +0.01% of the base weight a day. The key card says “+0.01%/d”.
- Where to get it: from the Safe of luck and challenge rewards — 10% of rewards come as a growth key.
- How to use it: on any safe with traits, even one with a weight key; it never burns, no need to make it eternal.
- Limit: a safe growth rises no higher than its class maximum +0.05%. The weight still grows only up to the capacity.
Where to get keys
| Source | Condition | Key |
|---|---|---|
| Daily logins | A streak without gaps: days 7, 15 and 30 | ×1.3–1.5, ×1.6–2.0, ×2.2–3.0 |
| AM weight growth | Grow your weight by the target amount in time | up to ×3–4 |
| 14 more challenges | Newcomer, race of the week, common goal, smith, collector, holder and more | ×1.1–2.2 |
| AMA2 lock, 30 days | From 300 AMA2 | ×1.1–1.25, eternal |
| AMA2 lock, 90 days | From 300 AMA2 | ×1.3–2.5 |
Challenges and rewards may change — the active ones are listed on the Challenges page.
Challenges
- Daily logins — visit every calendar day: opening the site or the app is enough. A missed day resets the streak to day one, keys already earned stay yours. A finished streak can be started again while the challenge runs.
- AM weight growth — grow your weight with purchases, levels and mints. Weight from keys does not count: challenges do not help each other. Didn't make it — the next attempt starts from your current weight.
- The other challenges — see the Challenges guide topic.
- Archive — finished attempts: rewards earned and missed.