Unexpected Challenge
Lux was looking at Jason in dumbfoundment, not sure how exactly he had been able to figure out his well-guarded secret. Not only was he dead, but he had fused with the same orb that was in his possession for more than ten years.
Seeing Lux's reaction that was the first change in his expression, Jason felt that he had hit the bullseye with both of his statements.
He didn't really remember what kind of orb Lux owned to revive the beings he had killed moments after they died.
But what Jason recalled was the fact that Lux could turn living beings into undead by simply killing them.
The orb would do the remaining work of turning their soul and mana core into some sort of Undead core. This core harbored the mana that was required to empower the remains of their body.
That was also the reason why Lux, the Lord of Death, was mostly in possession of Skeletal soulbonds.
Jason assumed that by fusing with this orb, Lux was killed, and revived.