Thanks for the quick reply.
I guess I should have checked the read me on the race thing, my bad...
To use the Horrific wail spell (not ability) would the CoreSpells.xml be in the A_LHLIB_UnitStat_BG_vM directory? That is where it appears for me but the horrific wail spell is not in that CoreSpells.xml.
Also, I have A_LHLIB_UnitStat_BG_vL with a CoreSpells.xml in it but those files appear to be older than the others and also do not contain the spell. I wonder if I need this folder at all?
I did find a horrific wail in X1_AISpells_Core_T. Not sure if that is the one or not?