In a Cave, the latest album from Elf Power (veteran members of the Elephant 6 collective), is a seamless, fuzzed-out, indie-pop gem. At times, that seamlessness threatens to turn into hypnotic repetition, but Andrew Rieger's lyrics about dreadful psychedelic romances or precariously hopeful godlessness keep things interesting. Elf Power are lesser gods in the E6 pantheon—not as crazy-genius as Neutral Milk Hotel, not as cartoonishly pop as Apples in Stereo, nor as glamorously fey as Of Montreal. But, by mortal standards, they're still pretty freaking great. (High Dive, 513 N 36th St, 632-0212. 8 pm, $10 adv/$12 DOS, 21+.)