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LONDON -- The street sex videosinternet loves a good mystery, and that goes double when it's a Harry Potter-themed one.

SEE ALSO: Harry Potter's childhood home can now be yours — for a price

On Wednesday afternoon, Pottermore-- the official website for all things Potter-related -- tweeted the following image.

Intriguing, but what does it mean?

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Well luckily, excited Harry Potter fans make excellent online sleuths.

First, people played around with the contrast.

The picture appeared to show a darkened shot of a dimly lit forest -- but what was it all about?

Some thought the trees might be to do with Fantastic Beasts and Where to Find Them.

Others suggested the image might relate to a much-anticipated Patronus Test.

And others simply tried to use magic to find the answer.

As the afternoon progressed, Pottermore tweeted more images.

The Patronus Test began to look like a real possibility.

There were also video clips.

By Thursday morning, things were becoming clearer.

At the time of writing, this is Pottermore's most recent clue.

If that isn't a silver stag Patronus about to form, we don't know what is.

It looks as thought we may soon have an official Patronus Test, people.

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