I think it was a pretty decent one. Right at the height of one of Odin's biggest victories so far, Laura shows up who can mess up his entire plan just by talking to Shadow for five minutes. And we're shown just how powerful the Gods actually are.
I think he probably got a decent supercharge in killing Vulcan and dedicating it to himself. Plus plenty of nordic folk still worship Odin. Not to the extent of the old times but enough that he's not forgotten.
Just goes to show that even weakened, the head of the pantheon is there at the top for a reason.
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Shadow's convo with White Jesus and the white buffalo telling him to believe likely gave Odin some "juice", as Technical Boy calls it.
the one thing i wonder about is, why Odin isn't more powerful seeing as there have been large scale wars taking place for the better part of two decades. In the book it makes sense because it was written before 9/11 happened.
But this show takes place in modern day where we've had wars in Iraq, Iran, Afghanistan, Syria, various parts of Africa... among many others. Is it simply a matter of Odin not figuring out how to "franchise" war the way Vulcan did with bullets?
Does Odin's old way of worship require war to be waged specifically with "the swords, the hammers and knives and stone axes"?
I can see that. Shadow already subconsciously believed in Odin enough to make it snow through an entire city.
And as far as I know, it's not that Odin couldn't figure out a way. It's that he didn't want to, and it seems only the New Gods are interested in a "brand new lemon-scented you". They're the ones who were born of branding, etc... and simply offer it to the Old Gods to win them over. The Old Gods seem to want/need the ancient forms of worship.