UTILITY FOG

Inactive utility fog is carried in a 1-liter container.  If it were poured out, it resembles a formless, colorless substance a little more viscous than water. When utility fog is fed instructions through a computer or neural computer, it can reorganize its size and density to produce a fog cloud of nanites.  Activating or deactivating utility fog is a move action.

Standard utility fog produces a 20-foot radius, 10-foot high cloud of nanite fog surrounding the controller. The fog can be programmed to move with the controller or left in place.  The controller range on utility fog is 100 feet + 10/level of the computer or neural computer used to control the fog. If the controller walks out of range the fog falls harmlessly to the ground and can only be retrieved by the controller coming back into range.  The fog can only be moved up to 30’ per round by the controller.  Utility fog obscures all sight, including darkvision, beyond 5 feet. A creature within 5 feet has concealment (attacks have a 20% miss chance). Creatures farther away have total concealment (50% miss chance, and the attacker can’t use sight to locate the target). 

A moderate wind (11+ mph) disperses the utility fog in 4 rounds; a strong wind (21+ mph) disperses the fog in 1 round. These nanites do not function underwater.

Solid utility fog functions like standard utility fog, but in addition to obscuring sight, the solid utility fog is so thick that it impedes movement. Creatures moving through a solid utility fog move at half their normal speed and take a -2 penalty on all melee attack and damage rolls. Ranged attacks are ineffective against creatures within the fog.  Kinetic weapons are slowed and energy weapons are diffraction and absorbed. A creature or object that falls into solid fog is slowed so that each 10 feet of vapor that it passes through reduces the falling damage by 1d6. A creature cannot take a 5-foot-step while in solid utility fog. Solid utility fog, and effects that work like solid utility fog, do not stack with each other in terms of slowed movement and attack penalties.

Unlike standard utility fog, only a severe wind (31+ mph) disperses these vapors, and it does so in 1 round.