Well, sorta realized an aspect I can expand upon.
Droplet Heat
A droplet will stay alive as long as it's core is warm, but this is no regular heat. Restored with blood, the heat is magical, if not divine, in nature.
However, a droplet will cool, and flames will keep it from going cold. But different droplets require different amounts of heat to stop it's cooling.
Original Droplet: Only divine fire can stop it's cooling, directly made fire, like the sun.
Greater Droplet: A product of divine creation can warm it, even if it's an indirect result. They can stop cooling when they're submerged in magma, as the planets are made by the gods.
Droplet: A forge capable of melting iron will be enough to stop it's cooling, there's no need for divine power.
Lesser Droplet: Even a campfire is enough to stop it's cooling.
But, to warm a droplet is almost impossible, warmth will only postpone it's need to consume blood.
A droplet will always thirst for blood.
Oh, and time to try and make stats for the Droplets.
Original Droplet
Strength +1
Endurance +3
Specific Strength: Wielded +3
Specific Dexterity: Wielded +2
Size +2
Amphibious
Extremophile
Flight
Subterranean
Affinity (Fire) +2
Immortality
Martial Arts +3
Not Alive
Vampire
0.004*3*12*5.2*10.4*6*1.75*1.3*1.5*1.3*5.2*3*6*5*4 = 388 036.235 059 2 E
Well, the Original Droplets are impossible to make. With a cost of almost 400 000 Essence, each.