User blog comment:Thewaterdragonslayer/Personal Reflections on the Differences Between 1st Generation Dragon Slayers and the Other Generations/@comment-188.171.27.28-20130207225715

Actually, Second Generation Dragon Slayers can enter Dragon Force. Originally, they even needed to do so, apparently, in order to use their DS powers, although Laxus has lately been seen using his Lightning Dragon's Roar without showing the scales on his arms.