I went to a 'Magic: The Gathering' tournament and was amazed at how much the cards cost

There were thousands of people here.

Lots of fans were taking part in matches against each other. Everyone seemed to be having fun.

People were still queueing to sign up to take part in the championship.

Popular games attracted an audience of spectators. Here's what was happening at table #1

There were even commentators talking about what was going on in high-profile matches.

The top matches were filmed, and had a judge standing over them to check that nobody was cheating.

Some fans were waiting to get posters and cards signed by Aleksi Briclot, an artist who paints the images for cards.

Here are two of the judges wearing their official uniform.

Lots of trading stalls around the outside of the tournament were selling Magic: The Gathering cards.

Some cards are crazily expensive! One rare card was being sold for £6,400.

Many cards sell for hundreds of pounds, others go for thousands. There's over £50,000 worth of cards in this photo alone.