[Valerius]

Ok, here is a savegame along with a modified CBM that makes Send Dream Horror a level 0 N spell. There are four dream horrors hiding in 15 ready for testing.

Edit: I just made send/call horrors also level 0 N spells so they could be included in testing. And ran a quick test with four castings of send horror in which the horrors did attack each other as well as the indies they were sent to attack. Which jogs my memory that they are quite willing to attack each other and not just other targets on the field of battle. So if you want to use this trick (and if they prove not to attack your other troops once charmed) you'll likely only want to use one with each force (or just use them solo).