Inalla, Archmage Ritualist might be the most powerful Commander of the bunch but suffers from the fact there are about a million different legendary Wizards competing for the role of Commander
Aragorn at Helms Deep Aragorn at Helms Deep depicts Aragorn fighting the battle at the Hornburg
Escape - spells with escape can be cast from the graveyard for their escape cost
Wilds of Eldraine is a fairy tale set with cool gameplay mechanics like Bargain, Adventure, Food tokens, and enchantment Roles, which can help define games of booster draft Limited
Treasure Guardian Protector of the Cave A card that cant challenge or quest unless it is at a location with only two lore
Although not all cards are valued at quite that much, it still shows that there is a player-based market involving hundreds of millions (according to reddit, almost 3 billion) dollars worth of cards