The power of Beric and Catelyn comes from the Old Gods, not the Lord of Light, and Jaime will be next.
No Song so Sweet replied to Lost Melnibonean's topic in General (ASoIaF)So the connection is some similarities in the description? I don't think that Beric has any relation to the old gods, there is no indication of that. He is a Marcher Lord, not a northener, he just had a connection to Eddard because he appointed him to chase Gregor instead of Loras. This doesn't indicate anything more, as Loras was also considered (because he volunteered). Also a wierwood throne is very different and very specific, wierwoods being there is much more plain. Maybe you suppose that Beric is much inferior in the share of power of the old gods than Brynden Rivers? Either case, I don't really by the idea, It doesn't have many compelling indications.