The Rhyniognatha is tamed through a unique breeding process: obtain pheromone from a male, use it on a suitable tamed host, then let a weakened female impregnate the host before fulfilling its cravings during gestation and raising the offspring after birth. As a mount, it excels at aerial, aquatic, and confined-space travel while carrying heavy creatures, cargo, and structures; its resin attacks offer ranged damage, immobilization, armor, and strong rider combat options. When encountering one, use a durable land creature, keep moving to avoid resin attacks, strike it with ranged weapons when grounded, and retreat through deep water or distract it with a larger creature if necessary.