SDCC / NYCC 2011 Convention Exclusive. BLACKEST NIGHT. Highly Collectable and Rare LIGHT-UP GREEN LANTERN POWER RING from DC Direct — a 2010-2011 Convention Exclusive made available only at San Diego Comic-Con and New York Comic Con to promote the DC Comics’Green Lantern comic book crossover event, BLACKEST NIGHT by Geoff Johns and Ivan Reis.