"Golden Runes"

As per the queen's instruction before…

Each of the halflings bit their finger and squeezed a drop of blood to the clouds below their knees, but their blood didn't touch the 'holy clouds' at all and slowly floated towards the magic circle! 

One after another of blood droplets entered the magic circle and the queen, who became the sole source of the holy light fuel, finally had more 'assistants' around her. 

Blood was always the carrier of important things in ceremonies. 

Even if the celestials disliked the blood clan who used blood like heretics, they also used blood in their important ceremonies. 

The queen's blood created the magic circle, but the holy light that came from the magic circle wasn't entirely from the queen's body. 

After the halflings' blood entered the magic circle, the magic circle with the feather as the magic core started to refine the halflings' blood into holy light.