Ritual of Weaving Shadow Silk

Ritual of Weaving Shadow Silk (RΣ)
Duration: Until noon
Experience Multiple: 250
Base Chance: 10% + 3% / Rank
Resist: None
Target: Area
Cast Time: 1 hour
Material: Shadow
Actions: Spinning and weaving
Concentration Check: None
Effects: The Adept may spin sufficient silk from a shadow at least five foot square to weave 25 square feet (+ 25 / Rank) in any shape or shapes of the Adept's choosing. This silk has no weight, and may be worn under armour to provide 1 point of Damage Reduction (+ 1 per four Ranks) from all incoming forms of damage. At Rank 20 it reduces damage by 5 or half the value of the armour, whichever is greater. This does not reduce damage caused by internal effects like poison, disease, Restorative potions and so on.
The silk is flexible (as silk is) while it is contact with the Adept, and indeed provides the same level of comfort as would be expected by anyone wearing silken underthings. However at the Adept's will or when not in contact with them, it becomes rigid. With with higher Rank the silk becomes stronger and more resilient:

Rank	Strength
0-5	Bone
6-10	Wood
11-15	Bronze
16-20	Iron

Any dimension that is less than 1 foot is considered to be 1 foot for the purposes of computing area. The fabric always appear entirely next to the Adept as it is being spun and woven.