Tengu format ruling
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Card effect (current official text)Return 1 "Neos" Fusion Monster you control to the Extra Deck. If all the Fusion Material Monsters listed on that Fusion Monster are in your Deck, you can Special Summon them.
Rulings
source: Rulings_Tengu (Format Library) · 2 era-inappropriate line(s) removedRulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.