Lightning Trigger

This Skill can be used if the only monsters (except Level 4 monsters) in your Deck are Thunder Type. [REQUIREMENT] During the turn you Normal or Special Summoned a Level 7 or higher monster with 1600 or less DEF face-up. [EFFECT] Decrease the ATK of 1 face-up monster on your opponent's field by [that monster's Level] x 100 until the end of the turn. Then, you can change 1 Attack Position monster on your opponent's field to face-up Defense Position.