I figure it out. It's from my Enemy Stat Changes. Because I reduced the HP stat for National Scar, it's causing some kind of problem in the AI. I'm gonna figure things out and repost.
Okay, in the Enemy Stat Changes, could you put the following near the National Scar HP stat? (I'm changing it in this section, instead of Behavior section, since it is directly related to Stat changes):
@OFF $D09892 ' National Scar HP Behavior
As for Mystic Book, its behavior depends on where it is. In some places (such as Emperor Castle or Snow Land), it's active from the start (even in vanilla), whereas in some places (Ice Palace and Northtown Ruins), it starts off stationary.
Also, could you please change the following in Enemy Behavior Change?
While I was testing, I noticed that Wolf Lord's vanilla HP is a lot lower than what I thought (so I'm creating this for those who don't use the Enemy Stat Changes). It's not a big difference between what I initially created (350 HP), so I'm not going to use IF and IFNOT function:
@OFF $D09E4B ' Wolf Lord Uses Cure Water below 279 HP
RAW 17 01
Also, in the Behavior Changes, I want to change what National Scar summons (Imp is so weak by the time of Tree Palace, and it takes National Scar a long time to summon it). Of course, this makes Imp an extinct monster, but your Night Cycle gives Imp back, so things should work out just fine.
@OFF $D0999C ' National Scar Spawn (Imp --> Gremlin)