If Amberser were still human, seeing the scene of his own head being plucked off, he should be preparing his will. But as an undead, losing one's head didn't necessarily mean death, especially since he was a Lich, and as long as the Life Casket wasn't shattered, losing a head meant nothing.
The question is, who is the blank slate beauty in the scene?
Was she the murderer who had decapitated him, or a future acquaintance… perhaps a friend?
If possible, Amberser would have liked Harvey to foresee the future once more, and it wouldn't matter if it cost a few more Gold Coins. However, the Goddess of Fate was like a high-maintenance "green tea" who flirted without committing, occasionally lifting her skirt to show you a glimpse of heaven, but if you actively sought to see more, she'd instantly become holier-than-thou, followed by a slap across the face.
No prophet could withstand a slap from fate.