Item ยท Currency
Yen
Yen controls world unlocks, system spending, and a big part of the game's progression pace even when gems get more attention.
How to get it
- Clear stages and quests
- Use economy-boosting routes like x2 Golds if you spend
- Sell unwanted low-value units when you need a quick push
What it is used for
- World unlocks
- Evolution fees
- Upgrade systems