natural-phenomenon-type monsters. Fire vortices still need to be dealt with properly, though.
git-svn-id: https://crawl-ref.svn.sourceforge.net/svnroot/crawl-ref/trunk@5716 c06c8d41-db1a-0410-9941-cceddc491573
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// God gift exception: Ball lightning is a natural phenomenon treated as
// a monster, so don't mark it as a god gift.
bool cast_conjure_ball_lightning(int pow)
bool cast_conjure_ball_lightning(int pow, bool god_gift)