combination. Humans – Humans occur in all colors but occur predominantly in white and green. White humans are frequently depicted as religious officials and warriors under the Church of Avacyn, while green humans are typically monster hunters. This is the first set in which humans are treated as a tribe. Spirits – Spirits mainly fall under white and blue mana, but also appear sporadically in the other colors. White spirits typically represent benevolent guardian spirits while blue spirits represent mischievous geists. Zombies – Zombies occur in black and blue. Blue zombies (or skaabs) are Frankenstein's Monster-like beings stitched together from disparate body parts and reanimated by necro-alchemists, while black zombies are ones that have risen from their graves through necromancy and attack in hordes. Vampires – Vampires occur in black and red. Black vampires showcase the sophisticated individuals that form the vampiric aristocratic families while red vampires usually depict vampires who indulge in mundane pleasures or have gone wild with bloodthirst, becoming utter bloodfeeding savages. Werewolves – Werewolves occur in red and green. Every werewolf is a double-faced card with the transform mechanic. One side of each of the werewolf cards represents the afflicted human, while the other side represents the actual werewolf that the cursed human transforms into when certain conditions are met. Green werewolves are usually hermits and outcasts, while red werewolves are mostly bandits and renegades. Mechanics Innistrad introduces four new mechanics (Curse, Fight, Morbid, Transform) and reintroduces one old mechanic (Flashback). Curses are a new enchantment subtype that enchants a player, causing negative effects (hence the name) of varying degrees. Fight is a new keyword that refers to two creatures dealing damage to each other equal to their power simultaneously (it had appeared on previous cards, but this is the first time it was keyworded). Morbid conditions occur if a creature has died earlier in the turn that the spell is cast or the ability is used. The transform mechanic allows certain creatures to turn into different creatures once certain conditions specified on the card are met. Each card that can transform is a double-faced card. The returning mechanic (from the Odyssey and Time Spiral blocks) was flashback. Spells with flashback can be played again from the graveyard, essentially getting a second use out of the spell. However, using a Flashback ability removes the card from the game. All the major mechanics of Innistrad, including Double-faced