Casting this spell adds 1d10 to one creature's Strength ability score (maximum 20). 

If cast using a 3rd level slot or higher, the target's strength score increases by 1d12, and the maximum is 22. However, a target who's strength is raised in this manner above 20 will, at the expiration of this spell, suffer the effects of a Slow spell and lose 1d6 off its strength score for 1 minute.