<P> In Norse mythology (a subset of Germanic mythology), Elli (Old Norse "old age") is a personification of old age who, in the Prose Edda book Gylfaginning, defeats Thor in a wrestling match . </P> <P> In Gylfaginning, Thor and his companions Loki and Þjálfi are in the hall of the giant Útgarða - Loki where they meet difficult challenges testing their strength and skill . Thor has just been humiliated in a drinking challenge and wants to get even . </P>

Who was the old man who stood up to loki