Disclosure version: premium-v3_mythic-v7_1b6c5388379d
Snapshot: 2026-11-07 · Configuration snapshot date; not a public release date. The version and source hash identify the exact configuration.
Primary disclosure: view the active in-game Rules & Odds beside each chest before purchase. Website rates are a configuration reference; Premium effective chances and quantities depend on your owned weapons and upgrade levels. Saved stock can retain older rules.
Premium Chest
Configuration version 3
Level-based random fragment rewards for owned weapons. Gold is awarded with every opening.
- Single opening · crystals: 300
- 10 openings · crystals: 2700
- Gold per opening: 500
- Daily ad limit: 1
Eligibility and effective probabilities
Only owned Normal, Rare and Super Rare weapons qualify. A rarity with no eligible owned weapons is excluded and the remaining configured weights are divided by their remaining total. Each eligible weapon is equally likely within its rarity. Ultra Rare and Mythic probabilities are zero. If no eligible pool remains, opening is unavailable.
Repeat rewards
Each reward is selected independently and the same weapon can appear more than once. Fragments accumulate for upgrades and do not unlock weapons. There is no guaranteed weapon or weapon pity system.
Fragment quantities
Normal and Rare: ceil(next upgrade fragment cost / 50), minimum 1, maximum 24. Normal rewards additionally use the level's Normal bundle multiplier. Max-level weapons use the base bundle (including the Normal level multiplier). Super Rare rewards give 1 fragment. Exact quantities are fixed when an opening is prepared.
Level progression
Each completed opening uses its starting level, then adds one opening to progress. A 10-opening purchase processes openings in order, so a newly reached level applies to later openings in that purchase. Receiving unopened stock adds no progress. At the highest level, the opening count continues to grow.
Daily ad availability
Up to 1 completed ad opening(s) per UTC day, subject to ad availability. A completed ad uses the same starting-level gold and fragment rewards as a purchase and adds one opening to level progress. No ad-skip ticket is spent. A cancelled or incomplete ad does not consume the daily claim.
Saved stock
Saved Premium stock preserves its granted configuration. Legacy stock opens first and follows its original 100 gold plus one 4-fragment bundle across the original released roster, not this rarity table. See the chest's Rules & Odds for the next saved stock and active purchase configuration.
Level 1 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 70% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 25% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 5% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 2 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 67% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 27% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 6% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 3 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 63% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 29% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 8% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 4 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 59% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 31% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 10% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 5 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 55% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 33% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 12% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 6 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 51% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 35% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 14% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 7 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 47% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 37% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 16% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 8 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 43% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 39% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 18% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 9 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 39% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 42% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 19% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Level 10 base rarity probabilities
Per independent fragment reward, before empty owned-weapon pools are excluded.
| Outcome | Quantity | Probability |
|---|---|---|
| Normal | 1 fragment reward; bundle quantity follows the rule below | 35% |
| Rare | 1 fragment reward; bundle quantity follows the rule below | 45% |
| Super Rare | 1 fragment reward; bundle quantity follows the rule below | 20% |
| Ultra Rare | 1 fragment reward; bundle quantity follows the rule below | 0% |
| Mythic | 1 fragment reward; bundle quantity follows the rule below | 0% |
Probability group total: 100%.
Mythic Chest
Configuration version 7
One random fragment bundle and gold per opening, plus a separate chance for an additional whole weapon and repeating milestone guarantees.
- Single opening · crystals: 500
- 10 openings · crystals: 4500
- Gold per opening: 500
- Daily ad limit: 0
Bundle ownership
Released Super Rare, Ultra Rare and Mythic weapons can receive fragments before ownership. Fragments are banked for upgrades and do not unlock these weapons. One bundle is assigned to one weapon. No weapon ownership is required to buy the chest.
Unavailable pools
If no Super Rare target exists, opening is unavailable. If an Ultra Rare or Mythic fragment target pool is empty, the bundle becomes saved unbound same-tier fragments until a released target is available. No unavailable whole weapon is invented.
Saved results
Prepared rewards and configuration are saved before charging. Retrying never rerolls. Older saved stock keeps its promised configuration; the chest's Rules & Odds shows the next saved configuration. Premium Chest level does not change Mythic Chest rates.
Whole weapons and duplicates
A new whole weapon unlocks at Level 1; previously banked fragments remain. A duplicate whole weapon converts to 20 fragments for that weapon.
Milestone guarantees
Every 25 openings guarantees an Ultra Rare weapon; every 100 openings guarantees a Mythic weapon. Both repeat and stack when both intervals are reached. Random weapon drops do not reset progress. A 10-opening purchase adds 10; ownership updates between rewards in that purchase.
Guarantee selection and all-owned fallback
First award the current featured weapon of that rarity if unowned. If it is owned, choose uniformly among other unowned weapons of that rarity. If all are owned, award 20 fragments for the featured weapon.
Featured rotation and selection
Featured weapons rotate Monday at 00:00 UTC in the listed roster order. Within the rolled rarity, the featured weapon has weight 3 and each other weapon weight 1. With N targets, its conditional chance is 3/(N+2); each other chance is 1/(N+2). This applies to fragment bundles and random whole weapons; overall rarity odds do not change. One prepared 10-opening batch retains one weekly selection across the reset. All listed released targets remain obtainable.
Fragment bundle probabilities
Exactly one bundle per opening; this probability group totals 100%.
| Outcome | Quantity | Probability |
|---|---|---|
| Mythic fragments | 1 fragments for one weapon | 4% |
| Mythic fragments | 2 fragments for one weapon | 2.5% |
| Mythic fragments | 3 fragments for one weapon | 1% |
| Ultra Rare fragments | 1 fragments for one weapon | 16% |
| Ultra Rare fragments | 2 fragments for one weapon | 6% |
| Ultra Rare fragments | 3 fragments for one weapon | 3% |
| Super Rare fragments | 5 fragments for one weapon | 35.5% |
| Super Rare fragments | 10 fragments for one weapon | 18% |
| Super Rare fragments | 15 fragments for one weapon | 14% |
Probability group total: 100%.
Additional random whole-weapon probabilities
A separate roll from the fragment bundle. These outcomes are mutually exclusive and total 100%; milestone guarantees are additional.
| Outcome | Quantity | Probability |
|---|---|---|
| Ultra Rare weapon | 1 whole weapon | 0.5% |
| Mythic weapon | 1 whole weapon | 0.1% |
| No additional random weapon | 0 additional weapons | 99.4% |
Probability group total: 100%.
Milestone guarantees
- Every 25 openings: guaranteed Ultra Rare weapon (ur).
- Every 100 openings: guaranteed Mythic weapon (mythic).
Eligible weapon pools
sr: Volatile Flask, Salamander Bellows, Caustic Corkscrew, Hermetic Prism Array.
Monday 00:00 UTC; roster index = floor(UTC day index / 7) modulo pool size. Day index zero is Monday, 0001-01-01.
ur: Galvanic Retort, Homunculus Hive, Glass Wave, Athanor Golem.
Monday 00:00 UTC; roster index = floor(UTC day index / 7) modulo pool size. Day index zero is Monday, 0001-01-01.
mythic: Philosopher's Crucible, Grand Ouroboros, Azoth Engine, The False Sun.
Monday 00:00 UTC; roster index = floor(UTC day index / 7) modulo pool size. Day index zero is Monday, 0001-01-01.
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