It's really no wonder Amberser doesn't always keep his word; after all, as a Lich, occasionally doing something evil ensures he doesn't forget his true nature. Otherwise, what kind of Undead would he be if he were constantly being bowed and knelt to by Paladins? What would his fellow Undead friends think of him?
An ordinary Undead might extract someone else's soul but still struggle to perfectly read their memories.
The soul is fragile, and the clash between control and struggle can damage it, which is why most Undead are dull and dim-witted.
Only those who willingly become Undead retain most of their rationality.
But Amberser was different; his Pseudo-Soul ability allowed him to forcibly create a soul from scratch, and after years of study, his understanding of the soul far surpassed that of ordinary people.
This Goblin's soul was unraveled into threads by Amberser, and the memories were on these soul filaments, not a single detail missed.
