[Killer's Mark] is another effect that was bestowed to all the Assassins of the [Eternal Shadow Guild], similar to the [Soul Whisper].
Although [Killer's Mark] is attached to the body of the cultivator who kills their assassins, Ethan was carrying that [Killer's Mark] for so long that his soul carried the slight traces of it.
Thus, when Ethan revived, these slight traces were transferred back to his body because only when this [Killer's Mark] was on the cultivator's body could the other high-ranked assassins sense it.
'The [Killer's Mark]… it has become extremely thin?'
Ethan's eyes lit up when he came to this conclusion as he guessed, 'It must be because of my death.'
'Phew… dying will remove the [Killer's Mark].'
When Ethan thought of this, he heaved a sigh of relief as it was the main reason he was frustrated and worried.