Tengu format ruling
Ancient Gear Factory
Card effect (current official text)Reveal 1 Level 5 or higher "Ancient Gear" monster from your hand, then banish a number of "Ancient Gear" monsters from your Graveyard, whose combined Levels are double the revealed monster's, and if you do, if you Normal Summon the revealed monster this turn, you must Normal Smmon it without Tributing.
Rulings
Select 1 Ancient Gear monster in your hand and show it to your opponent. Remove from play Ancient Gear cards in your GY whose total Levels are equal to double the selected card's. You can Normal Summon the selected card without Tributes this turn.
- You reveal your chosen "Ancient Gear" monster when the effect of "Ancient Gear Factory" resolves. Not when it is activated.
- You can activate "Ancient Gear Factory" and then decide not to Summon the revealed monster.
- You cannot select a monster for "Ancient Gear Factory" that you could not Tribute Summon, such as Level 4 and lower monsters.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.