Poison (Status)
From NEStalgia
A debuff that does damage per turn during a battle as well as outside of battle. Poison can be dispelled via the Detox spell or via a nun, who is typically located inside an inn. Poison can kill a target during a battle but not outside of a battle.
Outside of battle the periodic flash indicating that poison is active will cease once your HP drops to 1, but poison itself will still be active.
