Once the oath activates, the paper burns to crisp, leaving the burning enchanted runes floating in the air.
Then, the runes wrap into a sphere and penetrate all five raven demons' chests like extended spears. There is no pain, but the ravens can feel an intense source of foreign mana chaining down their hearts.
Once they experience the blood oath, the demons realize the burden of their every action. There is an invisible balance behind their back, and they can hear the clicks of that balance readjusting its weight.
Some shiver from the thrill of the unknown future, and others sense their necks getting chained by thorns.
Once the oath is placed in their hearts, the runes turn blue and shatter into orbs of light.
The raven demons let go of their held-up breath.
Trigon looks where Kyrie stood, but the spot is empty.
"Noble one?"
"H-Here….."
Trigon tilts his head down to see Kyrie crouching down.