Some cards scale with the number of tapped creature we control (Crash the Party, Harvest Season, Throne of the God-Pharoah) or give tapped creatures special benefits
Facilier, Agent Provocateur similarly bring banished cards back to your hand, making Amber and Amethyst the ideal deck if you love playing lots of low-cost cards and dont want to see them lost to the discard pile for the rest of the game
Bloomburrow is not a particularly strong constructed set and none of the mechanics offer a particularly good reason to maxamize them, so the set is left relying on stand alone cards
Gods arent inherently enchantments , although thats a defining characteristic of the Theros gods
At just 1 white mana, its one of the most efficient ways to deal with creatures permanently, so its a staple in artifact decks that want low-cost, high-impact interaction
as long as you can make at least three mana per loop, you'll have infinite mana in any colour you can normally produce