Tengu format ruling
Fake Trap

Card effect (current official text)Activate only when your opponent activates a Spell, Trap, or Effect Monster's effect that would destroy a Trap Card(s) you control. Destroy this card instead. (If the cards that would have been destroyed are face-down, you can look at them to confirm.)
Rulings
- The face-down Trap Cards protected by Fake Trap must be revealed when resolving the effect that would destroy them, to confirm that they are Trap Cards.
- If your opponent activates Heavy Storm and your chain Fake Trap, your Trap Cards are protected but your Spell Cards are still destroyed.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.