Common mistakes collectors make The biggest one
The rules are simpler, the battles are shorter, and it's a lot easier to build an interesting competitive deck due to the game being free-to-play and the availability of booster packs for players who don't spend any money
You did choose to run the deck, after all
Often called the holy grail of Pokmon collecting, it holds both nostalgic and financial value, with pristine graded examples selling for tens or even hundreds of thousands of dollars
There are plenty of ways to slip Lightning through enemy lines, like Rogue's Passage and Whispersilk Cloak, so you can reliably paint a target on the back of the tables biggest threat
Flash makes it versatile against all sorts of stuff, including notorious card drawing permanents, planeswalkers, cascade, etc