Tengu format ruling
Fiber Jar

Card effect (current official text)FLIP: Each player shuffles all cards from their hand, field, and Graveyard into the Deck, then draws 5 cards.
Rulings
- When the effect of Fiber Jar is activated, Fiber Jar itself is united with the Deck, even if it has been attacked and destroyed as a result of battle.
- If the effect of Fiber Jar activates during the Battle Phase, it does not end the Battle Phase, although the turn player will have no monsters after the effect resolves.
- If your opponent’s Parasite Paracide is face-up in your Deck when the effect of Fiber Jar is activated, it will remain there. The opponent should cut your Deck with his / her eyes closed after you shuffle to ensure fairness.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.