[Arryn]

Originally posted by LordArioch:
Rigor Mortis comes from Latin.

I don't think the spells are very powerful.

Rigor Mortis, the stiffness of death, is not to be confused with Rigor Mortis, deadly stiffness. The latter affliction is quite powerful and is common amongst those Burdened by too much Time. In order to distinguish the former, nonlethal effect from the latter far more dangerous one, scholars have taken to calling it "arthritis". Peasants, on the other hand, simply suffer regardless of what it's called, since there's no known cure.