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Hero-dric Cube Guide
The Hero-dric Cube (a nod to Diablo's Horadric Cube) unlocks at hero Level 4 and is your crafting hub.
Alchemy: turn junk into gold
Alchemy converts unwanted items into gold and Cube XP, and it is your main early gold source. Use Auto-Fill, but Alt+Click to lock any keepers first.
Synthesis: should I merge gems/items?
Synthesis combines 9 same-rarity items into one of the next grade (random, and it can skip tiers). Merge duplicates you won't equip, and don't feed it items you still use.
Crafting: early accessories
Crafting builds random gear or accessories within a level range, and it is the best early source of accessories.
Leveling the Cube and its XP rules
You level the Hero-dric Cube by feeding it items. Each level unlocks more functions and higher socket tiers, so a higher Cube is simply more capable. The XP comes from the gear you put in, which is why steady Alchemy and Synthesis feeding pays off over time. There is a community-reported rule about how a high-level Cube reads XP (unverified). The Cube is said to only accept XP from items inside its current level window. For example, a Cube in the 65 to 80 range stops gaining XP from items well below 65, while items at or above its level still count with no penalty. The practical takeaway is to feed items at or above the Cube's current accept floor and not waste low-level fodder on a high Cube. Save the low gear for gold and feed the Cube with gear that still counts.
Synthesis: upgrade or gamble
Synthesis has two uses. The plain one is upgrading. You put in 9 same-rarity items and get one item of the next tier, with a small chance to skip a tier. This is the safe, predictable way to push rarity upward. The other use is a gear gamble. With the market closed, you feed spare high or low gear into Synthesis to roll for better, higher-rarity gear. The catch is that the result can be for a class you do not play, so it is a real roll rather than a guaranteed win. If the market is open, a synthesized high-rarity item can be sold for Steam Wallet funds instead, which turns the gamble into a payout you can actually use. Quick guidance on where to lean. If your goal is maxing the Rune Tree, lean on Alchemy for gold. If you want a shot at top gear, lean on Synthesis and accept the variance.
Synthesis Odds (9 same-rarity → 1)
| From | Success | Great success / stays |
|---|---|---|
| Common | 95% → Uncommon | 4.8% → Rare (+2) |
| Uncommon | 96% → Rare | 3.8% → Legendary (+2) |
| Rare | 98% → Legendary | 2.4% → Immortal (+2) |
| Legendary | 99% → Immortal | 0.99% → Arcana (+2) |
| Immortal | 50% → Arcana | 50% stays (fail) |
| Arcana | 33% → Beyond | 67% stays |
| Beyond | 23% → Celestial | 77% stays |
| Celestial | 17% → Divine | 83% stays |
| Divine | 9.1% → Cosmic | 91% stays |
Dismantle Value by Grade (gold)
| Rarity | Gold |
|---|---|
| Common | 10 |
| Uncommon | 30 |
| Rare | 90 |
| Legendary | 270 |
| Immortal | 810 |
| Arcana | 2,592 |
| Beyond | 8,294 |
| Celestial | 29,029 |
| Divine | 101,602 |
| Cosmic | 355,607 |
Sources
- Steam store page
- In-game verification (TBH: Task Bar Hero)
Data updated 2026-06-22