Spectral Lantern

With this spell, a dedicant of the silver light may call forth a gleaming pale orb to hover between the material and astral planes. As its power is rooted in the physical world which all shades instinctively seek, so will they be drawn to it, gradually congregating near it over time. While not an end unto itself, many a mage has used this singular ability to slowly amass a near-army of otherworldly beings.