999.4…
Wei Wuyin was unable to inspect the Bloodline of Sin tattoo's current changes with his eyes closed, yet the infusion of Karmic Luck Value that he felt was exact and completely comprehensible. His senses were extremely sensitive to Karmic Luck and its aura to the point he could ascertain its exact value. This discovery enlightened him that his Soul, Body, and Mind was experiencing unseen changes.
Unfortunately, he couldn't determine how much time was shaved off towards the deadline until the 3rd Calamity, yet he didn't agonize over it. He had consciously made the choice to deliver that lethal blow, furthering his understanding of Blessed while ridding himself of a potential issue down the line. After all, after thoroughly invading Jing Jiu's Sea of Consciousness, he didn't think he'd have time to delicately erase his memories of his actions in this Battlefield.