 Battles take place on a grid @-@ based map , with the battle system employing a turn @-@ based system for the player , enemy units and allied units . The movement and attack ranges of enemies can be optionally displayed to players . While seventy @-@ four units are accessible in @-@ game by completing its chapters , only twelve can be taken into battle at any one time . When two units engage , a separate battle screen activates , and the battle plays out automatically . Enemy resistances to weapons are covered by the Weapon Triangle : lances are strong against swords , swords are strong against axes , and axes are strong against lances . Each unit gains experience points with each action , and when they accumulate 100 points , they level up and their stats are randomly raised . Each unit has a class , which affects their weaponry and movement range : these classes , when at level 10 , can be promoted to a stronger class using a Master Seal item . 
