Blood slaves escape?

[Graeme Dice]

Originally posted by JJ_Colorado:
If I somehow have blood slaves turn into regular troops, how do I turn them back into "gems" (in the dungeon) that I can use again? Right now I have some that show up like regular troops and I can't get them back into my BS pool.

You can't actually turn them back into usable blood slaves. The reason they were converted into units has to do with them being damaged at the end of the battle, so they aren't identical enough to be converted back into gems.