Hellsteeds are powerful winged Nightmares.
Although they appear to be winged horse, their skin is covered in hard scales with protective bone protrusions on its head. The beasts blood is black and stinks of sulpher whilst long claws and fangs can easily disembowell even an armoured man. Some have no skin or manes and tails for fire whilst their wings are broad, talon tipped and bat-like. [1a]