Typhon

Typhon was a doomsday weapon created by the Titans in the depths of Tartarus, a matter worm designed bring system failure to the Cosmos--a final revenge against the usurpation of the Olympians. Typhon was defeated before it could reach full virulence, but only after infecting Echidna and turning her into the mother of monsters.

Typhon appears as a storm of black dust--actually a gigantic storm of rapacious micro- and nanobots. Those caught in the storm may be temporarily blinded on a roll of 1 on a d6. Even those not blinded can become confused per Mutant Future. The Typhon storm inflicts 2 points of damage to any character engulfed, double damage to those without some degree of protection (at least thick clothing or armor). Hiding in a body of water halves damage. Even after leaving the storm, a victim with take damage for 3 rounds. The swarm takes no damage except from fire or area effect energy or cold attacks.

Anyone who dies in the swarm rises as a zombie-like vector of Typhon. They develop a random physical mutation as their DNA is overwritten by Typhon. Anyone who takes damage but does not die must make a save vs. Poison or be infected:

Typhon Infection
Save Modifier: -2
Infection Duration: 2 weeks
Affected Stats: INT -1, WIL -1
Damage: 1d4
Further, every week of infection carries a cumulative 20% chance of developing a random physical mutation for the duration of the infection. Those infected hear the whispers of Typhon in their minds, urging them to destruction.