Eternal Ink

An ink used for drawing magical symbols for spells. Not all spells require the spell sigil be drawn with Eternal Ink, but even those that don't require it will be strengthened by its use. (+3 to caster level on non required spells). The resistance has begun experimenting using it in tattoos. 
== Recipe ==
* Mash up the brain of one raven, two fairy wings, and 1/2 ounce of human stomach, into a paste using a wooden mortar and pestle. 
* Add to it, three drops of blood from the ring finger of each hand and 1/4 tsp gravedust. 
* Beat the mixture into 1 oz of Octopus ink until it foams. 
* Remove the Foam of Aphrodisia, and what you have left is Eternal ink.