How does Azor's Gateway work to transform mana into card advantage and provide a powerful advantage in the game?

Azor's Gateway is a Magic: The Gathering card that allows players to exile cards from their hand and transform them into mana. Once enough mana is accumulated, the card flips into a powerful land called Sanctum of the Sun, which can generate even more mana. This transformation process helps players access more cards and resources, giving them a strategic advantage in the game.