Thats the niche that the manifest and manifest dread mechanics fill
While Miracle was flavorful, impactful, and fun, it just didn't fit comfortably into high-level, competitive Magic
Peer into the Abyss Why, just why
Even if you fail to use Essence Flux in this exact circumstance, one mana to save a creature from removal is a great cost that's sure to provide you with a mana advantage in most situations
I do wish it helped you get descend, so it was both a payoff and an enabler those often make the best signpost uncommons, but its such a good payoff for loading the graveyard with permanents that it still looks like a nice signpost Uncommon Exploring whenever you gain life is something Im interested in, especially on a two mana 2/2 with Ward Pay 3 life
Its going to be really interesting to see how players build with and around this card, particularly because it works with any color combination