Above the skyscrapers of New York City, the virtual stone HALO is suspended in space and time, etched in the atmosphere and expressed in shadow on the tidal East River below. Using mixed reality, AI, and satellite data, the giant sculpture geolocates in the sky, from dawn to dusk a symbolic celestial vision framing Manhattan. The abstract monolith is carved from a codified rare marble from Aotearoa NZ, transported through extended reality to the homelands of the First Nations Lenape people, the Lenapehoking. Over the traditonal Manhatta trade route, HALO articulates an absent presence. Activated beside Brooklyn Bridge from the public domain of a tree-lined park pier,  people encounter the monolith on intimate and communal levels, an uplifting reprieve from the oppressive heat of the city. The monumental presence adapts, almost subliminally, as the light shifts, and remains anchored as winds rise across the water, and planes and boats circle above and below, outlining a fresh view of a city which never sleeps.