Design Philosophy
How We Value History — The Craft Behind Every Card
At Sumeru & Seed, we do not assign content by abstraction or balance-by-feel.
Our guiding principle is simple:
Nothing in the Sumeru & Seed card universe is invented lightly. Every image, description, and value is the result of historical research, archaeological evidence, and scholarly debate.
Our cards are built through a collaborative process—drawing on the work of historians, archaeologists, and economic historians—supported by primary sources, academic references, and quantitative analysis.
What you see on each card is not speculation, but the outcome of research, discussion, and careful reconstruction.
This principle applies to every card in the Sumeru & Seed card universe.
An Example of How We Create an Iberian Cavalry Card：
The values on this card are derived from historical evidence, not abstract game balance. Each statistic is calculated from documented weapons, armor, unit scale, and battlefield performance.
- Attack (9) reflects the Iberian cavalry’s use of long spears and curved swords in aggressive flanking and wedge assaults, effective against exposed infantry but not designed for frontal shock.
- Defense (6) is limited by light to medium protection, small round shields, and loose formations, making the unit vulnerable in prolonged or head-on engagements.
- Speed (8) represents high battlefield mobility gained from light equipment and agile horses, allowing rapid maneuver, pursuit, and disengagement.
- Morale (7) is based on tribal resilience and persistent resistance against Rome, strong in short engagements but lacking the cohesion of fully professional armies.
- Unit Size (1,000 horsemen) reflects historically attested cavalry contingents—large enough for tactical impact, but insufficient for sustained independent operations.
- Armor Type (Medium Cavalry) accounts for Montefortino-style helmets and partial protection without full heavy cavalry equipment.
Together, these values form a unit that performs as it did historically:
Drawn from Spain’s fierce hill tribes, the Iberian cavalry were well-armed, disciplined, and deadly. With curved swords and long spears, they drove into Roman flanks in loose wedge formations, resisting Rome relentlessly and fighting to the very end.
An Example of How We Create a Luxury Item (Luxria) Card：
Roman Silver Skyphos
1. Starting from Ancient Sources, Not Modern Assumptions
Our valuation begins with a primary ancient reference:
Emperor Diocletian’s Edict on Maximum Prices (301 CE), one of the most detailed economic documents to survive from antiquity. The edict is used here as a late-imperial silver benchmark, not as a direct price reference for the late Republic.
The edict records:
Silver, pure, in bars or coins – 6,000 denarii for approximately 300 grams.
This establishes an official late-imperial benchmark of material value:
about 20 denarii per gram of pure silver.
2. Accounting for Monetary Debasement
The Roman denarius was not a stable unit across time.
- Early Imperial denarius: ~3.9 g of silver
- Late Imperial denarius: largely nominal
Using the edict’s silver benchmark, we can calculate that the denarius had lost roughly 98–99% of its original silver content, representing a ~78× debasement relative to the early standard. 6000d x 3.9g / 300g=78
This step allows us to translate raw metal weight into real purchasing power, rather than misleading face value.
3. Verifying the Artifact Itself
The card is based on a documented 1st century BCE Roman silver skyphos, with a recorded weight of approximately 327 grams, supported by archaeological parallels and a verified Christie’s auction record：
A Roman parcel-gilt silver skyphos, dating to the late 1st century BCE–early 1st century CE, measuring 10.8 cm in height and weighing 327.2 g, sold at Christie’s in 2004 for USD 623,500.
Converted purely by silver content and adjusted for debasement, this yields:
≈ 83 denarii in raw material value.
But this number is only the beginning, not the conclusion.
4. Why Raw Silver Is Not the Final Value
No Roman elite purchased a luxury vessel as bullion.
A silver skyphos of this quality required:
- Highly trained silversmiths
- Specialized urban workshops
- Repoussé and relief decoration
- Polishing, finishing, and quality control
In Roman wage terms:
- A common laborer earned roughly 1 denarius per day
- A skilled artisan earned 2–4 denarii per day, often more for elite commissions
Such a vessel would require weeks of skilled labor, meaning labor and workshop costs alone could match or exceed the value of the silver itself.
5. Craftsmanship and Social Premium
Roman luxury silverware functioned as:
- Banquet display objects
- Status symbols
- Markers of elite identity
Historical evidence consistently shows that finished luxury goods commanded multiples of their raw material cost, reflecting:
- Scarcity of skilled craftsmanship
- Commission-based production
- Social prestige attached to ownership
This premium was not speculative—it was structural to Roman elite culture.
6. The Final Standardized Value
Combining:
- Raw silver content (~83 denarii)
- Skilled labor wages (~40 denarii)
- Workshop overhead (~20 denarii)
- Craftsmanship and status premium (~20 denarii)
- Merchant Margin (~30 denarii)
The Roman Silver Skyphos is therefore standardized on the card at:
Ancient Value: ~200 denarii
This figure represents total economic cost, not bullion equivalence.
7. Cross-Cultural Balance
To allow meaningful comparison across civilizations, values are also expressed using a neutral interregional unit:
Imperium Trade Value：200 denarii ≈ 20 tael Silver ≈ 2 tael gold
Under this system, 1 denarius ≈ 3.9 g of silver, 10 denarii equal 1 tael of silver, and 10 taels of silver equal 1 tael of gold.
This ensures Roman, Han, Parthian, and steppe economies are compared on material reality, not nominal coinage.
A Design Philosophy, Beyond Cards
This methodology reflects our broader commitment:
We do not balance Sumeru & Seed Imperium Cards by fantasy. We balance them by history.
Every card is the result of:
- Primary ancient sources
- Archaeological evidence
- Economic reasoning
- And respect for the craftsmen of the ancient world
Our goal is not just to represent history—but to honor how it was made.
That is the philosophy behind every card you hold.