Lands that become staples are often very expensive because of how easy it is to include them in multiple decks, and Bloomburrow brings two new contenders that I foresee following this exact trajectory
Black had Dark Ritual ($440) for 3 black mana, red had Lightning Bolt ($960) for 3 damage, white had Healing Salve ($30) for 3 life, green had Giant Growth ($265) for +3/+3
Throw in some integral game pieces like Buried Alive, and this strategy starts to make a little more sense
What makes it one of my favorites is how cheap it is and how quickly it can scale in a game
For example, what is the set's budget, how much new art it has access to, what raw materials can it access, what printers can it use, etc
Next we have the ally color "protection from" creatures from Conflux the Outlanders: Never underestimate the power of protection