Outward Channeling is the ability to destroy any material with the mind. This ability is seen in Lodestar. All elves can do this, even Talentless, so it is practiced along with levitation and others so that the elves are able to better defend themselves from the Neverseen and similar threats. While this is not considered an "manifested ability" like Telepathy, Vanishing, and Conjuring are, it is still something all elves are able to do. Telepaths seem to be able to outward channel better than other elves, because "their minds hold a much larger reserve of energy, which can make it easier to transfer" (Lodestar, page 420). It also may be easier for Hydrokinetics to master this, because Linh is very good at it and says she understands it.