[Arryn]

Originally posted by Norfleet:
That'll make the spell require a unit that is simultaneously a level 9 holy and unholy priest. That ain't gonna happen...ever! As a result, this spell is uncastable.

It's a truly inspired idea, in theory. I suggest that it be checked out in an actual test game to be sure the folks at IW didn't include impossible-conditions checking in their code (something which all good programmers should allow for to make their apps bullet/idiot proof), which might cause the game to do something unfortunate like ignoring your directives.