LOL.
That's very wierd. You mean that as the result of this battle your bloodslaves become actual soldier type units instead of gem-type comodity that they normally are??
If this is the case, and if I would be you, I would grant the most heroic of your Bloodslaves the Gift Of Reason, as the reward for his deeds in that battle, for the sake of Roleplaying.
Than you can try to get him into HOF by giving him good items and/or empowering him. This way you would become the only owner of Hero Bloodslave in existance.
Perhaps you could even write a nice AAR story around it, someting like "From Rugs to Riches"...