Nona has 5 chess pieces around her, they are originally black chess pieces. Black chess pieces will turn white in ascending order: Knight, Bishop, Castle, Queen, King when there are enemy BGs or summons deceased(exclude phantoms).Every 2 deceases of friendly BGs and Summons may also turn black chess pieces white. Each chess piece has its own effect. Knight: Incerases attack speed of all allies. Bishop: Heal all allies over time. Castle:Increases all allies' physical attack and spell power. Queen: Reduces damage taken for all allies. King: Forces all enemies to use basic attack only. White chess pieces will exist as long as Nona stands. Different effects may stack up.