Anyone lucky enough to catch Mary Armentrout’s reveries and elegies last season knows what a master she is at mixing video, spoken word, music, doorways, dusk, birthday cakes, and movement into riveting performance. Luckily for those who missed it, she will remount reveries in her space at the MilkBar (851 81st Ave., #223, Oakland), in the Sunshine Biscuit Factory every Saturday and Sunday in January. But even if you’ve seen reveries, you haven’t seen this one — an exploration of life’s fragmentary, impermanent nature, the piece changes every time Armentrout performs it, and adapts to each of the many spaces it has occupied. In any configuration, it’s performance art at its most intelligent, humorous, engaging, and beautiful. Performances are timed with dusk, so don’t be late or you’ll miss the magic hour. And dress warmly, as the space is unheated. Seating is limited to 25 people each night, and tickets are available in advance only.