Greed

Alex swiftly bound the mask to himself before taking the dark elf form, and the first thing he did after that was ask his guardians to see if they detected any abnormality to confirm that he was using an identity-changing skill.

To his absolute delight, not even his guardians could tell he was not a real dark elf, at least not if they didn't use the blood sense and see that the blood running through his veins was still human, and he also had two hearts with his mana heart being bigger in size resembling more of a human heart than an elven.

This issue was resolved by recoding another blood clone, and ten minutes later, besides him having two hearts, which was not normal for humans or elves, he was a normal dark elf, and unless he was forced to tell the truth, no one was going to discover his identity.