Understanding Horrors?

[Fate]

1) There is a spell "Horror Mark". The various items which say "slight chance of Horror Mark" mean on the wielder, unless it says "on hit:..." I believe a few globals can also horror mark the caster...

2) There should be what looks like a negative of the prophet icon (purple & green). If you click on it you can find out how strong it is. Stronger marks have a higher chance of attracting horrors.

3) Yes. The powerful, rarer kind.

4) Script them with buff spells, give them blood slaves (to surround them), and powerful body guards (troops set to "guard commander"). Oh, and cross your fingers.

5) When the horror just attacks your god, it is considered an assassination attempt. Only a random 5 bodyguards (troops set to "guard commander") can protect their commander. The "ring of warning" item increases that number to 10. The same goes for "normal" assassinations, too.

Horror marks mean that horrors in battle will target your commander first (everything from the phantom horrors up to the Hunter of Heroes and God Eaters). Horrors will also appear during battles and attack the horror marked commander. Finally, they will occasionally show up and try to assassinate the commander. Because many of them have horror-marking attacks (attacks which increase the target's horror mark), it is quite a slippery slope.