Soul Spell
Since brute force didn't work, Jake readily tried another method and it turned out to be the right choice.
Determined, he released the claw from one of his index fingers and directed the Grey Aether from his other claws and fangs to that claw. The claw, which he could now extend up to 20 centimeters thanks to the evolution of his bloodline, now seemed to be wrapped in a ghostly grayish light sheath.
Next, his lava veins and his entire body began to glow with intense heat. Calmly, he concentrated all this heat towards this single claw and very quickly it began to shine as bright as a mini sun.
The radiant heat of his claw was such that his own skin was somewhat itchy just by coming into contact with the heated air. Right now, he wouldn't have dared to touch his own claw without a thick layer of Constitution Aether for protection.