I too loved "A Subtle Knife" :) https://hisdarkmaterials.fandom.com/wiki/Mulefa https://hisdarkmaterials.fandom.com/wiki/Mulefa > The most notable feature of

I too loved "A Subtle Knife" :) https://hisdarkmaterials.fandom.com/wiki/Mulefa https://hisdarkmaterials.fandom.com/wiki/Mulefa > The most notable feature of the mulefa was their use of seed pods as wheels. Once a zalif reached puberty, they were able to fit their spurs into the disc-shaped pods, and propelled themselves along "roads" of solidified lava with their side legs.