Increases damage of Kunai Splash and Kunai Explosion by 20%.
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For each 3 Refine Levels:
Increases damage of Kunai Splash and Kunai Explosion by additional 10%.
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Refine Level +9:
Increases damage of Kunai Splash and Kunai Explosion by additional 20%.
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Refine Level +11:
Increases damage of Kunai Splash and Kunai Explosion by additional 20%.