Fake Trap's latest text from the booster pack Dark Beginnings 1 reads: You can only activate this card when your opponent uses an effect of a Spell, Trap, or Effect Monster to destroy Trap Card(s) on your side of the field. Destroy this card as a substitute of those Trap Card(s) and the other Trap Card(s) are not destroyed. If a Set card(s) would have been destroyed, pick up and see the Set card(s).
According to this, if your opponent activates Heavy Stormand you have Fake Trap set and at least one other Trap card, you can chain with Fake Trap. When the effect of Heavy Storm resolves your set Spell cards, if you have any, are destroyed and your Trap or Traps are protected. Of course, you'll need to show your opponent the Traps that would have been destroyed to confirm that your not cheating.
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It is a fake card, there is no real card of that name.
Yes it is fake, there is no such card as Exodia the Dark Master
In a 'casual' game amongst friends, there is no real reason why you can't play by whatever rules you want. There is nothing stopping you using a fake card, if the other players agree to it.
its fake
there is always a gold or silver or brown square in the very bottom right corner of the card if it is real. the back of the fake card will be lighter in color and often not have everything on it. also fake cards will have fake types and attributes most of the time. if it is missing the box, has fake types and attributes, or has a light back, it is fake