Edison format ruling
Kaibaman
Card effect (current official text)You can Tribute this card; Special Summon 1 "Blue-Eyes White Dragon" from your hand.
Rulings
- Ignition Effects on monsters cannot be activated while the Effect Monster is face-down. So this face-down monster cannot be Tributed for its own effect.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Edison forum — sourced change requests get reviewed.