Light of Intervention

Edison Card Text
Monster Cards cannot be played face-down. Monsters Set in Defense Position are played face-up on the field and are considered summoned.
Pharaoh's Servant • 2004-12-01
No targeting
No Damage Step effect
Banlist • Unlimited
Rulings
edisonformat.net
●You can activate (flip face-up) this card at any time; it does not need to be activated in response to a Summon.
●The effect of this card applies to both players, and does not affect monsters that are already on the field face-down. These monsters remain face-down until flipped face-up as normal.
●While this card is on the field, monsters can be Normal Summoned in face-up Defense Position, and can be the target of Trap Hole and will trigger effects like the effect of Mysterious Puppeteer.
●While this card is on the field, if a monster would be Special Summoned in face-down Defense Position (such as with Cyber Jar or Nimble Momonga), it is instead Special Summoned in face-up Defense Position.
●While this card is on the field you can't flip a monster face-down with Book of Moon, Darkness Approaches, etc.
edisonformat.com
You can activate (flip face-up) this card at any time; it does not need to be activated in response to a Summon.
The effect of this card applies to both players, and does not affect monsters that are already on the field face-down. These monsters remain face-down until flipped face-up as normal.
While this card is on the field, monsters can be Normal Summoned in face-up Defense Position, and can be the target of "Trap Hole" and will trigger effects like the effect of "Mysterious Puppeteer".
While this card is on the field, if a monster would be Special Summoned in face-down Defense Position (such as with "Cyber Jar" or "Nimble Momonga"), it is instead Special Summoned in face-up Defense Position.
While this card is on the field you cannot flip a monster face-down with "Book of Moon", "Darkness Approaches", etc.