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This is what I have:

FALERIN ADMIRAL AMADA ZORBAK THE GODS ARE IN THE NEBULA

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"Falerin, Admiral Amada, Zorbak: The gods are in the nebula." Or perhaps:

"Falerin, Admiral Amada: The gods are in the nebula." --Zorbak
Because the word ZORBAK appears in the last word. It's interesting that both Falerin and Eldron have lied in their clues: Falerin said the rail was four, and Eldron said that none of these three would be involved. Eenteresting.

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It is noteworthy that, by removing the names hidden in the message, you get the actual "message" part. Also, although the names are split up among the other words, the words of the message are self-contained: TFHALEE has "the," GROIDNS has "gods," AADRMIE has "are," IRAN has "in," THE has "the" (no, really?!), and NZEOBRBUALKA has "nebula."

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About Eldron lying, I wouldn't say so much. He just made an hypothesis: Zorbak isn't prone to use codes, so that seemed to make him an unlikely source of the message. That he seems to be the one who wrote it doesn't mean that Eldron was lying. Simply that Zorbak is being unusually careful, which probably says a lot about the importance of the message.

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the words were intermeshed.

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just because zorbak is the most deceptive friendly NPC doesn't make him not likely to use codes to send an important message right, and eldron too is not lying, his sense of guessing is just not very good

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The gods are in the Zorbak nebula

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Zorbak somehow got a nebula named after him

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I think Eldron's musings were part of the clue. The names were meant to be "eliminated" as he said, leaving the rest of the message that you guys decoded. Although what the message actually MEANS... very mysterious. I have no clue! Nice work, that must be some kind of record time

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The numbers are all perfect squares if that matters at all.

4 1 18 11 13 1 4 4 5 18 19

19 5 3 18 5 20 12 9 5 19

15 14 16 21 18 7 15 19

This is what I'm thinking:

dark madders

secret lies

on purgos

...Dark Madder is a person maybe? And his secret lies on Purgos? Or are the statements not related to each other? Hm.

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Dark ladders secret lies on Purgos.

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I think you might have made a mistake, the fifth number is 169, square root of that is 13 and L is not the 13th letter in the alphabet.