A topic from AEG's L5R CCG Rules forum, copied for Oracle of the Void from a copy of the forum saved in October 2015, so pages it didn't save are missing. Players' names are left out; the rules officials are named. Rulings are as they stood on these dates; later rulings, the rulebooks and the Rules Archive may differ.
http://rules.l5r.com/EE_Effects
Negation rules make my head hurt...
Say I use Power of the Night on a 3C weaponized personality and my opponent reacts with Hundred-Fold Cut. Is the 100FC able to negate the -3C delayed effect from PotN?
If not - why exactly? Because the -3C is delayed, or because Chi Death destruction is from the rulebook (Chi Death Rule), not from the Power of the Night itself? Or both?
Say I use Power of the Night on a 3C weaponized personality and my opponent reacts with Hundred-Fold Cut. Is the 100FC able to negate the -3C delayed effect from PotN?
No.
If not - why exactly? Because the -3C is delayed, or because Chi Death destruction is from the rulebook (Chi Death Rule), not from the Power of the Night itself? Or both?
Neither, actually.
And I should note, In the above case, the destruction IS from the Power of Night itself, per the Chi Death Rule. But there's also another part of that rule more pertinent to your question:
http://rules.l5r.com/EE_Card_types#Personality_stats: "This destruction for having zero Chi may only be negated or prevented by effects that specifically negate or prevent destruction for having zero Chi."