A/N - I noticed some glaring errors requiring too much work to fix off hand, so the story is down for a rewrite. No schedule on the re-upload, it will be done as life allows.
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Spoilers ahead!
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guest review – Frankly, I chose Viggo because I didn't believe his death. He had the skrill -which has been shown to be able to direct it's blasts quite carefully, so that wouldn't have killed him - , the bad guys were mainly focused on Hiccup, and we have seen our viking friends survive many ridiculously deathly things. Perhaps the future holds a conversation with Viggo, who knows?