>>5814327>>5814658The mark of the Dark One has a <span class="mu-i">very</span> simple foundation of four overlapping circles that form a flower, at the center of which is a symbol known as the Nameless One's Eye. The full symbol (as shown on the right) is also known as the Black Primrose.
The outer circles are often wrapped in thorns or spikes of iron as a factor of intimidation, and if constructed properly (as the one upon Astrid was) the Eye will <span class="mu-i">always</span> blacken in the sclera while its red iris glows. Many people believe the Dark One can see through these marks, as peepholes from the prison in which the Lord of Light sealed him. This ceases when they are defaced (as the one upon Astrid was by her actions), though the continue to writhe with evil power for some time afterwards.
Each circle upon it represents one of the Four Great Depravities: Domination, Depravation Degradation, and Destruction. Traditionally, the top circle is Domination, the bottom circle is Depravation, the left circle is Domination, and the right circle is Destruction. Though so long as Domination and Depravation only overlap within the Eye, the position matters not.
The four instersection sections represent the Great Woes - two born of the World (Depravation), and two born of Man (Domination). The Worldly Woes are Disease and Famine, while Woes of Man are Debauchery and Unjust War (if someone has a better term for that which isn't just "invasion", please let me know).
Post will be later tonight!