If not for the stark difference between the new skin and the surrounding flesh, no one would have guessed such a vicious wound had ever been there.
"The scent of a demon... Haha! You dared to steal a demon's power. You'll suffer a brutal backlash, foolish human!"
On one point, Garm was right.
The so-called Forbidden Spellmark let a human body wield a demon's power.
The first price was the corruption of the body by demonic power, which left the Winchester Family unable to have children.
They could only carry on the family by adopting them.
It was an equivalent exchange.
Then came the erosion of body and mind.
Why did the Winchesters carry such a complete array of standard equipment?
So they could avoid using the Forbidden Spellmark, or at least use it less.
Once they used it, they had to end the fight quickly.
Otherwise, the consequences would be unthinkable.
Geralt wasted no words. He drove the demonic power through his body, and the blue wing tattoos over his shoulder blades turned red, giving off black mist.
The mist condensed into wings of bone and membrane.
Their wingspan was nearly two meters.
—Demon Wings.
The Forbidden Spellmark advanced in ten-percent increments. Each level released multiplied his strength.
At ten percent release, Geralt had four special abilities:
[Demon Wings] [Gilled Breathing] [Day Camouflage] [Night Mist-Hide]
With a beat of his Demon Wings, Geralt flew low into the air. He looked down at Garm and crooked a finger.
"Come on, doggy. Let's hurt each other."
Garm flew into a rage and spat a mass of dark-red lava.
Geralt was ready. He twisted aside and flew straight toward Garm.
He drew the Mithril Dagger, slipped between the attacking claws, and opened a long gash along Garm's side.
Beads of