I've tried searching through the FAQ, the help system, and and forum topics on this, but couldn't find my answer. In any case: I've a shaper with 153 essence, but lost several creations in battle. Hitting a healing pool brings back health, but does nothing for essence. Neither does moving around in an area, or moving between areas, gaining levels, or adding more intelligence (though the last does increase both the essence pool, and the amount of available essence--but only the amount relative to the improved intelligence).
For some reason, entering Isengard Keep restores essence. Short of using essence pods, are there any other locations that regain essence, preferably without cost? Thanks.