Positive Summon is a new summon in Yu-Gi-Oh! BW. This is activated when you remove from play 2 or more monsters on your field. These monsters are held in the Extra Deck. When a Positive Monster is summoned that Positive monster has to have the sum of Stars that the monsters you used to summon it had. Monsters that add up to 13 or more is always level 12. The Positive Monster also always have the sum of the ATK and DEF of each monster. If the ATK or DEF or both reaches above 5000, then it is 5000. Some Positive Monsters have ? ATK and DEF. These monster cards are color coded light blue like the sky.
Example[]
Take Stardust Dragon and Harpie Lady for example: It would form "Harpie Star Dragon."