Wild Hunt?

Ok, so I've searched the forums, manual and wiki quite extensively about this subject but have can't really find any specifics about it other than that it summons the Lord of the Hunt to attack enemy priests.

Since this spell is a little hard to test I'm wondering if anyone could tell me some specifics:

does the lord of the hunt make only one attack per turn?

are more powerful priests targeted first (ie: holy-3 priest)?

has anyone ever had the experience of this spell being useful? (in CBM at least)

thanks