Blood Scrolls

Store information on a scroll or other piece of material with the caster's own blood, other blood mages can read this scroll by transfusing the blood into their own memories.
Casting Time: Ritual, casting time depends on the knowledge stored in the scroll that is determined by the DM.

Spells stored: For each level of the spell, the process takes 2 hours and costs 50 gp

"To store and preserve the old techniques a method was created to allow the