The useful question
The useful question in a game economy is not only how players get resources. It is why resources remain meaningful after they are created. Sources add value to the economy; sinks give that value somewhere to go.
Without sources, players cannot progress. Without sinks, resources pile up until decisions lose weight. A durable economy needs both sides to be visible enough that players can plan.
What changes in play
Sources shape daily behavior: mining cards, rewards, expeditions, プレイヤー対戦 outputs, or seasonal grants. Sinks shape commitment: upgrades, recipes, card progression, contributions, fees, or conversions.
When both are balanced, players compare timing. Spend now, save for a recipe, upgrade a card, support the guild, or contribute to the season. That is where economy becomes strategy.
The balance should move over time. Early abundance can teach the loop, while later scarcity can ask players to specialize and coordinate.
Where 奇跡 has to be precise
奇跡 has to show where each resource comes from and what consumes it. Eight resources can create depth only if players can read scarcity, bottlenecks, and opportunity cost.
The game also needs to avoid hidden drains. If a sink consumes resources, cards, tickets, or ウォレット-related value, the player should understand the exchange before committing.
Source and sink language should be connected to the same resource names everywhere. If an item is called one thing in mining and another in upgrades, the economy becomes harder to learn.
How to read the system
Read an economy by following one resource from creation to use. Where does it enter? What competes for it? When does hoarding hurt? When does spending too early hurt?
If those answers are visible, the economy is readable. If resources appear and disappear without explanation, players will stop trusting the numbers.
A good economy makes players feel smarter over time because they can trace the path from production to consequence.
That trace is the practical proof that sources and sinks are doing real design work.