Question on npc spell casting lists in DB?

[ChaosSlayer]

thank you for answering.

few more questions:

from what I understand an npc only has ONE spell it can proc as random?

I am looking at for exmaple at list 44 (Snake and Spider). it has
attack_proc 1001 (i presume its number of spell) and proc_chance 3

so it can proc spell 1001 at 3% chance?

BUt it also has: a spell list which has spell 765 Inject Poison with manacost -2 and recast_delay -1

so.. still confused.. it can proc 1001 at 3% chance but it can also chain cast 765 at no mana cost?

also- coudl you giuve more details how/from where parent list is coming from?

thanks