Does anyone know what

WISpellDangerous

is and what it does? Some spells have it as a keyword.

A keyword would change a few things that also have that keyword, sort of like a variable. So if a spell has that keyword and another spell blocks anything with that keyword in it, it will act as a guard against anything with that keyword instead of scripting every spell to be blocked or act differently.

OT:

I don't think this or a few other topics you've made deserve their own thread, there's a quick question, quick answer thread for short stuff like this. Also, use the search function, most things this small have already been answered.