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′ = A + min(A·(m − 1), (m − 1)·2·A0·(1 + level bonus))
m — key multiplier, A0 = 35 AM — weight of a new safe of the epoch, account level bonus +2% per level, up to +40%
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:
days = clamp(round(30 · (m − 1)−0.6), 7, 60) + account level
keys up to ×1.25 are eternal and never expire
| Key | Lifetime | Tempered → | 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 | 21.0 AM | 70 AM |
| ×1.5 | 45 d | ×1.1 | 35.0 AM | 70 AM |
| ×2 | 30 d | ×1.2 | 70.0 AM | 70 AM |
| ×2.5 | 24 d | ×1.25 | 105.0 AM | 70 AM |
| ×3 | 20 d | ×1.25 | 140.0 AM | 70 AM |
| ×4.5 | 14 d | ×1.25 | 245.0 AM | 70 AM |
| ×7.7 | 10 d | ×1.25 | 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.
- Tempering. A hot key can be tempered into an eternal one: 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.
- Account level adds +1 day of life to new keys and +2% to the cap per level.
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.