“Nearby, Ayo Jackson, a recent M.F.A. grad, was pinning cotton puffs into the background of her piece, while a mirrored version of her, with a braided unicorn horn, twirled above; it was inspired by the medieval Unicorn Tapestries at the Cloisters in northern Manhattan. “I like the last image, where the unicorn is resurrected,” she explained. “I wanted it to be an analogue for black stories that end in pain.”