Double Break is a skill that appears exclusively in Dragon Quest Tact. It is a skill used by Estark during his Mega Boss Battle where he delivers hellish slashes with his Underworld Sabres, enfeebling any foe struck by them.
Double Break is an enemy-only skill that can be used by Estark during his Mega Boss Battle and costs 50 MP to use. It inflicts 700% potency unreflectable Zam-type physical damage and greatly lowers the Martial and Zam Res of any units standing in two rectangular areas of effect in front of him. He will use the attack on the first action of his second and eighth turns, as well as the third action of his sixth turn.