This card offers a wide variety of useful effects, at the cost of life
For 5 mana probably not worth playing unless you are focused on spawns and scions
While this is a high-risk play that can go wrong in a number of ways, it also has a high reward if they dont have a Griselbrand in hand and no way of comboing through Daze
Not only does it allow you to play less lands in your deck while still hitting your land drops, but the two card combination of an end step March of the Multitudes, untap, and Flourish is going to be format defining
Instead, other spells either generate or allow you to spend energy counters for various effects
People also appreciate what a cool idea it was, and the excellent flavour of their being a single copy of the MTG One Ring