When refining reaches +5 and using axes, gain +3% physical damage. When refining reaches +10 and using axes, gain +5% physical damage. When refining reaches +15 and using axes, gain +7% physical damage.
At refining +10 and above and using axes, every following 1 refining increases Atk by 1% (up to 5%) and Max HP +1% (up to 5%).
Starting from refined +8, every +1 refining increases Atk by 2% (up to 16%).