Function rate
From Helbreath Portal
Function rate is how much of a bonus each of these items give (for example, how much hp regen a magin ruby would give)
Magic Diamond: Completion rate / 5 = Functions rate. Maximum 20. (not%)
Magic Ruby: Completion rate / 5 = Functions rate.(%) Maximum 20%.
Magic Emerald: Completion rate / 10 = Functions rate.(%) Maximum 10%.
Magic Sapphire: Completion rate / 10 = Functions rate.(%) Maximum 10%.
