Dark Revelation
Trap Card
<At the Start of the Battle Phase> If the effect of your monsters' [Inventor] has activated 4 times or more during this Duel, all opponent monsters in the Lane ahead of you lose 1500 ATK.
Related Skills:
 | Inventor | <When Summoned>Gains 1 Skill at random. 1 additional Skill is gained if your monsters have activated [Inventor] 4 or more times in the Duel. |