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Triple 7

+1% chance to get 7x more balls than normal when the bar fills

Field Value
Cost growth 3.5x per level before New Game+ adjustment
Cost behavior Normal room upgrade. Room cost reductions can apply; New Game+ makes cost growth steeper.
Player impact Improves the room’s income, speed, cost curve, or support systems.

The chance is exactly 1% per level. If it succeeds when the Pachi bar fills, the generated ball count is multiplied by 7.