Jubjub could turn into a Jubjub Engineer, while a Mynci could not. Hero & Villain (White, and Black) Villain cards and Hero cards both have extremely high ability numbers, and are designed to oppose one another. If a villain is played, the arena in which the villain is located is effectively sealed off until the villain is confronted and beaten, until which point the players cannot start contests against their opponent in that arena, only the villain. A Hero card can be used to fight a difficult battle (often against a villain), but can be used only once before being discarded. Item & Equipment (Red, and Blue) Item and Equipment cards increase a Neopet's abilities, by adding points onto the printed base number in one or more categories, and frequently have special abilities that affect gameplay. Whereas Items can only be used once before being discarded, Equipment is attached to the Neopet and remains there until it is removed by another card. The advantage to Items is that they can be sprung upon an opponent unexpectedly. Item and Equipment cards are also the only cards worth points, ranging from 0 to 8. A player must "bank" 21 points worth of Items and Equipment cards in order to win the game. Something Has Happened! (Purple) Something Has Happened! cards cause a one-time, instantaneous event or effect to occur. These cards often are used to influence the outcome of a battle, and are then discarded. Because one can discover that "Something has Happened!" at virtually any time, such cards can introduce a heavy element of surprise. Location (Green) Location cards can be played in one area to affect all future battles taking place there (until they get replaced by another Location). The Location can give an advantage to a certain kind of Neopet, or can cause some side effect to any battles occurring there. Location cards are typically based upon the fantasy locations of the Neopets website. Fate (Orange) Fate cards are divided into two sub-categories: Curse and Quest. Curses are usually placed on a Neopet belonging to the opponent, and have a negative or detrimental effect on that Neopet. Because Curse cards typically remain in play, they can cripple a given Neopet's ability to perform effectively. Quest cards affect all parts of the game, and are (usually) neutral. Constellation (Dark Blue) Constellation cards represent constellations in the sky which impact play