You see, Painful Truths can act just like Ancient Craving for one less mana, as long as you spend black and 2 other colors on it
Rarity Ultra rares, alternate arts, special illustration rares, and limited print cards tend to hold more long-term demand
Let us know what your favorite artifact support card is in the comments or on the Draftsim Discord
But for those looking for condensed advice: the ingredients of truly fierce competitive decks are infinite combo pieces, tutors to find them quickly, resource acceleration (mana rocks) to cast all those cards faster, and cheap interaction to stop opposing combos developing
It launched near $500 and has appreciated slightly since release
its capable of ending games as early as turn two because of how absurd the value can get, as long as you build in ways to break it