Hell-Tuning Invasion

This Skill can only be used if the all of the monsters with 1400 or more ATK in your Deck are LIGHT Attribute Fiend monsters. [REQUIREMENT] Send 1 card from your hand to your Graveyard. [EFFECT] Make 2 face-up Level 4 or lower Fiend monsters on your field become Level 5 until the end of the turn. Then, you can choose up to 2 monsters on your opponent's field. If you do, make face-up monsters chosen become Level 4 until the end of the turn, and change face-down Defense Position monsters chosen to face-up Attack Position. During this turn, you can only attack with monsters with 2300-4000 ATK.