Strength of One sets the Strength of every party member to 18/75 for 1 turn. If any party members have Strength scores above this value by either natural or magical means, it will be lowered to 18/75.
In-game description Edit
|“||When this spell is cast, the entire party is given a Strength score of 18/75. If a party member has a Strength score higher than this (either naturally, or through a magical item), then his or her Strength is lowered to 18/75. The spell lasts for 1 turn, whereupon everyone's Strength returns to normal.||”|