Angela gave a soft snort when she saw this.
He had just said that she wouldn't be able to hold back and would kill him, but didn't he do the same?
However, she also knew that this was different since this was a controlled way of killing him which she couldn't do.
Momonga was the Lich King, so naturally he had laws that were more pertaining to death.
While it seemed like he had just killed him with a single word like with death laws, in truth Momonga had actually killed him with his darkness laws, slowing everything in his body to the point where he had died. But by using his darkness laws to kill him, it had also allowed him to draw out the soul of the man he had just killed.
If Lin Fan had to describe it with a term from earth, it would be called necromancy.