Like a cloud of black dust, a swirling swarm of insects hovers in the air. From within comes the low, droning buzz of thousands of tiny flies.
Str 2, Dex 11, Con 10, Int —, Wis 11, Cha 2
A living creature injured by a botfly swarm's attack must make a DC 14 Fortitude save or be infested with the swarm's larvae. The larvae may be cut out of the host with a DC 15 Heal check, though each attempt inflicts 1d8 points of damage whether or not it's successful. A remove disease spell destroys all larvae without further harm to the host.
Botfly larvae: infestation; save Fort DC 14; onset 1 day; frequency 1/day; effect 1d4 Con damage.