If I had been feeling better, I should have seen if I could trade my healing for things. I don't remember any construct ooloi, but... I think it was hoped they would be able to do things like regrow others' limbs. My ooan could only manage that with my human mother's help -- humans don't do it naturally, but some of the same... switches that cause tumors when turned on my accident can be used to regenerate limbs when turned on in the right sequence.