Initially, Thunder Dragon was an integral part of the GOAT format because it helped thin the deck
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The smartest move is to keep quiet about the card, pop it into an inner sleeve, outer sleeve, and a toploader, and talk to professionals your bank, an accountant, even legal representation who can help you manage such a windfall
Most excitingly, they're printed on the original galaxy holofoil paper used in the Wizards of the Coast era
With the knowledge and tools available, our specialists can determine if an item is genuine and unworn
Couldnt: Commander has no sideboard (except for Companions ), so this wont work, but modifying this card so that it would search for lands from your deck seems like it would be missing the point