Varmund's concentration essence.
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CON +3.

ATK +5 and P.ATK +3 per 20 base CON of the user.

If the enchanted equipment is grade D, additional P.ATK +1 per 20 base CON.

If the enchanted equipment is grade C, additional P.ATK +2 per 20 base CON.

If the enchanted equipment is grade B, additional P.ATK +2 per 20 base CON.

If the enchanted equipment is grade A, additional P.ATK +2 per 20 base CON.