Drifters can be likened to flying walkers in that they fulfill a similar function for the home cyst. However, they are also deployed within 1d4 miles of the actual cyst itself to form a defensive perimeter. They also send word of intruders back to the cyst by some unknown means. Also unlike walkers, drifters are equipped with solar cells that replenish their stores. Drifters attack with their sampler arms all at a single target.
Sheens are remarkable easier to hit and damge with most kinds of magic.
Other that which affects the mind, sheens receive receive a -3 penalty to resist their affects. Immune to mind influencign effects, poisons, disease and similar effects. Not subject to critical his, subdual damage, energy drain or death from massive damage. They lack sampler arms but can discharge an electrical bolt from their sensor arrays. This bolt can be fired at any target within 30 feet of itself causing 3d4 damage with a fortitude or reflex save reducing the damage by half.