The Winged Dragon Of Ra is of Ultra Rare rarity and Secret Rare rarity, the highest rarity status in the Trading Card Game, being impossible to obtain during the show's appearance, but has since been easier to obtain over time
Here are some tips: Understand Card Values: Familiarize yourself with the current meta and rarity of cards
But honestly, I think its much more interesting to try to compile your own bespoke decks that can undo their ways
This is the minimum necessary to play the Archenemy format under the current rules, so all you need is one Duskmourn EDH precon (and some friends with their own Commander decks) to play Duskmourn Archenemy
The Cosmic Soul Stones' lack of serial numbers also opens the door to easier illegal counterfeiting, once a skilled counterfeiter gets hold of an original copy, as the quantity of these cards distributed across the world is unknown
Since it has such great Ixalan flavor, Im running it here