Unaware of how much time had passed since he began bathing his blood with both chaotic qi and astral energy, Alex finally reached the stage where he was meant to take an oath, and he could tell that there was a foreboding intangible force that was waiting to disrupt all that he has accomplished if he failed to make the right oath.
Trusting in Xander's words that such an oath would be harmless to him since he had the Sword Heart in him.
Alex began taking his oath, swearing his loyalty to the Drakhelm Empire and its betterment. The moment he completed this oath, Alex felt a force reach into his soul with such a gripping force as if it wanted to take a part of his soul away.
But right before it could do so, this force was kept at bay by a vibration, coming from the Sword Heart. This vibration made this force gentle, causing it to only leave a stamp on Alex's soul.