[Graeme Dice]

Originally posted by Zen:
When Blood Slaves are damaged but survive (rare) they then turn into normal troops. There is no way I know of to convert these back. But when they are on the battlefield, and near someone who casts a blood spell AFAIK they will be used.

There is a possible bug with the blood slave unit, unless it has been fixed in recent patches.

If you gift of reason one, then empower it in blood magic, then place it on the battlefield and order it to cast a spell that requires blood slaves, I believe that the program would crash in previous Versions.