Shadows over Innistrad returns to the gothic horror themed plane of Innistrad, emphasising a sense of mystery and creeping dread. The expansion symbol of the set is an upside down reflection of Avacyn's symbol. The set features the same tribal components as the Innistrad block with the five main tribes each being split over an allied color pair.^[5] Spirits primarily in white and blue, Zombies in blue and black, Vampires in black and red, Werewolves in red and green, and Humans primarily in green and white. For the mechanics, R&D made a conscious decision to return more to Innistrad the set than Innistrad the block.