Jon MacNair opens windows into cryptic worlds with his monochromatic pen-and-ink drawings. His work has a decidedly vintage, if not medieval, feel. The artist renders elaborate depictions of self-created myths and legends, but rather than being grandiose, the tone of his work is self-aware and humorous. Demons and shamans mug for the viewer while performing rituals and spells. Some of his drawings show gratuitous, cartoon violence akin to that of heavy metal album art and skateboard graphics. MacNair has a solo show opening at Portland’s Antler Gallery this Thursday, August 28, titled “Age of Enigmas.” In addition to his own work, the exhibition will feature MacNair’s collaborations with five other artists he admires: Jennifer Parks, Trudy Creen, Mark Burt, Ian Anderson, and Michael Hsiung.