REDU format ruling
Gaap the Divine Soldier

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)All monsters are changed to Attack Position, also their battle positions cannot be changed. (Flip Effects are not activated.) Once per turn: You can reveal any number of Fiend monsters in your hand; this card gains 300 ATK for each, until the end of this turn.
Rulings
(1) All monsters are changed to face-up Attack Position, and their battle positions cannot be changed. (Flip Effects are not activated at this time.) (2) Once per turn, you can reveal any number of Fiend-Type monsters in your hand to give this card 300 ATK for each revealed card, until the End Phase.
- The (1) Continuous Effect applies while Gaap is face-up on the field.
- Set monsters changed to Attack Position by this effect are not treated as being Flip Summoned.
- Torrential Tribute CANNOT be activated.
- Both Players can Set monsters, but they are immediately changed to face-up Attack Position.
- Cards / Effects that Special Summon face-down / Set monsters can be activated, but those monsters are immediately changed to face-up Attack Position.
- The (2) Ignition Effect can only be activated during the Main Phase.
- Revealing a Fiend-Type monster(s) from your hand is a cost.
- You can choose how many Fiend-Type monsters you reveal.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.