Nothing beats in playing OPTCG Sim v1.13a. Using this simulator really helps you to test your deck ideas before doing it physically. Video below is my testing battle using Magellan Purple Deck against the same deck, Magellan Purple Deck. Watch it how I beat the other mirror counterpart.
Magellan Purple Deck Mirror Match
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Special thanks to Batsu Games for developing the OPTCG v1.13a.
If you would like to support the project or the costs of hosting the servers (absolutely never required and gives you no special benefits), you can become a patreon at https://www.patreon.com/BatsuApps/ or send money directly through paypal at batsu.apps@gmail.com.
OPTCG Sim application is available for Windows, Mac, Linux and Android devices. For IOS devices, stay tuned for the announcement. Refer to this link if you want to download the app.