[Staring at Luke a moment, he eyes the end of his scarf, and then rallies, rushing very slightly.]

Wwell, that's about all there is to say on that topic anywway. The hemospectrum's easier. Basically, trolls rank in a hierarchy based on their bloodtype, lowwest and commonest bein' red and highest bein' purple. The higher up the line you get, the better the troll is, until you get to trolls wwith purple blood like myself wwho are aquatic and just generally superior.