When you duel too frequently (normally 2 duels before you are handicapped, but this can be altered by a few relics), you will suffer a decrease in your attributes. Investing in the skill decreases the time this handicap is in effect. The standard handicap lasts 60 minutes, but each level of this skill reduces the waiting time by 1 minute. This means at level 50, the effects last only 10 minutes.
Learning level: 5
Max level: 50