Double Up is an ability in the Dragon Quest series. It has changed significantly throughout its appearances, but it always affects the potency of the user's attack.
Double Up strikes at 200% power, but the user suffers increased damage during the round. The skill has the second highest priority of any action in the game, trailing only behind Kaclang.
Localized as Berserker in the PSX version, the skill is learned by reaching rank 3 in the Paladin vocation.
This ability is learned with 22 skill points allocated into Guts skill. It increases attack by two stages, while lower defence by one stage. The bolstered attack state lasts 6~9 turns, and the crippled defence 7~10.
Hendrik will learn double up through his Heroism skill tree for 16 points. It costs 4 MP to use and operates as it did in IX.