This monstrosity resembles a mosquito bloated to the size of a housecat, whose heat-shedding body glows like a torch .  It is a rare mutation for a fireball fly to grow to this size, as most are closer to the size of bees, and work dutifully together in a swarm . The greater fireball fly still possesses a strong instinct to sacrifice itself when threatened—even if it no longer has any swarm to protect—and the resulting explosion is much stronger than that of its kin. 0.