Unlike most of the other battles, Invasion of Ikoria costs two green mana plus X, where X is as much additional mana you want to sink into the cards casting cost
Activates in response to opponent's monster effects in hand or GY, or from your hand
These pairings are named after the Ravnica guilds, including Azorius, Dimir, Rakdos, Gruul, Selesnya, Orzhov, Izzet, Golgari, Boros, and Simic
Given the world allegiance theme of Buddyfight , central to the games mechanics are the players Buddy Monster and world-specific Flag Card, which add both flavor and special abilities that players may use
While it doesn't really impact the value of the cards, it makes it easier when it comes to finding out which cards are the best ones to chase, because most players will have some idea of a Pokemon's value