Hi Jason, I like what you're doing here, as I read it, contrasting raw lifeforce (soul power perhaps) with the result of various erosions upon it.
The final two stanzas are the strongest for me; the beginning could be stronger with some tightening. The "-ation" rhymes sound forced, for instance.
Also in the very beginning, the use of "gallant steeds" implies less-than-wild horses, not feral, but ridden, serving the needs of masters gallantly, etc. so maybe rephrase that bit.
Thanks for posting!