The unicorns shall come down - ראמים reemim, translated wild goats by Bishop Lowth. The ראם reem Bochart thinks to be a species of wild goat in the deserts of Arabia. It seems generally to mean the rhinoceros.
With blood “With their blood” - מדמם middamam; so two ancient MSS. of Kennicott’s the Syriac, and Chaldee.