A windwhale is a sentient flying beast living in the Plains of Fear. It resembles a cross between a shark and a jellyfish. Some specimens can be over 500 yards long and 100 yards wide. The windwhale lives in symbiosis with the flying manta rays. Flocks of mantas inhabit the crevices in its body and protect it from attack. Its only vulnerability is fire, as the whale produces flammable gas in order to fly.
The windwhales serve Old Father Tree. They are used for transport and living weapons by Darling. They are carnivorous and do not mind eating the horses and soldiers. Their tentacles can crush buildings.