The return of wonderfully abstruse Nineties guitar-benders Polvo might not be the splashiest indie-rock comeback (that distinction goes to their Chapel Hill, North Carolina, homeys Superchunk). But it's one of the finest. On Siberia (the follow-up to 2009's In Prism, their first LP in 12 years), Ash Bowie almost whispers cracked visions ("The tiny fucking rainbows appear in the mist") on songs that seem to rock out and melt into the mist at the same time. They're heavier than in the Nineties, and freer, going full-on Game of Thrones for "Old Maps." This is what getting the band together should be about.