“Las Maldiciones” arrives at National Sawdust as a rock/pop opera staged in the language of the live set. It assembles a rotating bill that includes Britton & The Sting, Lola Kirke with Odetta, Storey Littleton + Calder the Destroyer, Black Belt Eagle Scout and Mato Wayuhi with Ailani, Bruce Brubaker Live!, and a Friday the 13th dance party led by DJs Eli Escobar & Cosmo. Framed for a New York audience, it treats the opera house as a club, and the club as civic space. The result suggests a local argument: in NYC, new “opera” can be built from scene, not canon.