Dark Blow is a skill that appears exclusively in Dragon Quest Tact. It imbues a melee strike with shadowy lightning.
Dark Blow is known naturally by Phantom fencer and Skeleton at level 1 and costs 3 MP to use. It deals 120% Zam-type physical damage to one enemy. It can also be taught to any unit by using an ability scroll, which can be earned as a reward for completing the fourth stage of Walking corpse's Battle Road or exchanged for medals in the limited Dragon Quest III event shop.