Sophia's Blessing is a potion rewarded to a player for submitting Gavriil's Ring to General in Chapter 1. The potion increases all of a players stats by 30 for a duration of an hour (Note: Even if you submit the ring, you still have to kill the summoned Nidhoggr's Revenge as part of Chapter 1)
It is character-bound, meaning that it cannot be traded, sold, stored, or dropped.
It has unlimited uses, so it will never run out.
It is recommended that players use the potion at all times, especially before adjusting stats. You can reset your stats using the Reset Girl NPC in Moonhaven (214 190).