Among The Powers — Lawrence Watt-Evans

Bredon didn't mean to interfere with the Powers -- but then they interfered with him! When the beings of myth and legend start fighting among themselves, mere mortals had best beware. Millennia ago, the survivors of a crash settled the planet of Denner's Wreck. Their descendants long ago forgot their own history. Centuries later, the planet was rediscovered by visitors who stayed -- and came to be called The Powers. The descendants of the original settlers soon learned to treat the newcomers like gods. Then, one fine day, Bredon the Hunter found himself caught up in the affairs of the Powers - at just the moment one of them went mad! With a new afterword by the Author. Previously published as Denner's Wreck.