Essence of Purity

Essence of Purity 
Mystic 
Proficiency [Knowledge] 
400 hours
You are something of a connoisseur; you know how to tell the quality and purity of blood by its taste. The ritual involves heating a specially prepared vial or test-tube over a flame for a few moments. A valuable skill to elitist Vampires, this skill may also be used to determine such factors as the presence of foreign agents in someone's bloodstream, such as alcohol. How well you roll on the skill check determines your accuracy. Rolling the minimum 10 gives you a 100% margin for error—for example you can tell if someone is a Vampire or not by testing their blood, but that's about it. For each point over ten on the roll, you are able to double your accuracy: to within 50% with a result of eleven, to within 25% by rolling a twelve, etc. While the blood-mage may know his current degree of accuracy, but exactly how close, or to what side he erred, will remain undetermined. Determining subtle genetic traits ("blooded" backgrounds involving different species) is much more difficult; a roll of twenty or higher must be made, with the same rate of progression as before. It is possible to continue to retest this ability, but the standard -2 penalty for repeated actions applies, and most people won't stand there & let you poke at them all day taste testing their blood.
Category:Death
Category:Skills
Category:Mystic
Category:Proficiencies
Category:Blood
Category:Divination