Having decided to take some blood for himself, Yoze followed his instincts and placed his finger in Grave's black blood. The moment his finger touched the flowing black blood it seemed to be attracted to him as it flowed up his finger.
It gave Yoze the sense that this black blood was alive and wanted to eat him alive. Fortunately, his own blood heart that his cheat had created the moment he took the Blood Heart talent activated and started beating hard.
With each thump of his blood heart, a bit of the black blood was absorbed into his body giving him a sensation as if he was injected with warm water into his veins.
After a few seconds of thumping Yoze pulled his finger away from the black blood to its disagreement due to a full feeling coming from his blood heart.
"I have a blood heart and my regular human heart. Making me one of the few people in the world with two hearts." Yoze thought to himself with amusement before stepping away from Grave's body.
