Behirs are legendary lightning lizards tamed by the storm giants for use as mounts.
Chronicle
Case 17e02
Revealed as powerful storm creatures bred and maintained by storm giants as mounts; their eggs were corrupted by Rhyzophus in his experiments to create his own army of twisted beasts.
Case 17e04
Encountered by agents while infiltrating the stables; one specimen proved amenable to negotiation when offered freedom from captivity and promises of justice against those who stole its eggs.