When you do this for the first time, the app will automatically transfer over your collection of cards and other items from Pokmon TCG Online
That's obviously a huge number, so it is best just to ignore the chance of them occurring and enjoy them if they do
This lets you build a fighting deck using multiple attackers with varying weaknesses, so there wont be any one deck that auto-wins against you due to typing
I tried to find an estimate online, and the only number I could find was for $99999 on MTGStocks
Modern bot detection layers like PerimeterX and Akamai look beyond the IP and analyze browser fingerprints, such as your user agent string, screen resolution, installed fonts, WebGL renderer, and even how your mouse moves
Soulbonding Doom Weaver with a 4/4 already produces a card-building engine, plus it's just a good include in spider decks