[PsiSoldier]

Ive only been in one game where I suspected Horror seed had been cast on me where the game continued long enough for me to notice the effects.. Eventually I began having several commanders per turn who were attacked by Horrors. At that point it was pretty much a pain since many of them were unable to cast effective spells to kill horrors like Frozen heart, incinerate etc..

Granted Horror seed may not have been the real cause in that game because I was using Lightless lanterns for research, but if memory serves I did have commanders being attacked by horrors that had never used the lanterns..