Skill

A skill is an attack or attribute of a character. There are two types of skills: active skills and passive skills. Active skills are triggered when the character attacks, while passives are either always active or have a chance to be triggered when attacking or being attacked.

Active skills can be further split into single-target and multi-target. Generally, multi-target is better, as the net damage is greater and you can attack more enemies at once, but following up with single-target.

Active Skills
The main character has 5 active skills that are rotated through depending on

Active Skills
Active skills of partners cannot be changed. Up until the red rarity, all cards of the same rarity have identical active skills depending on whether they're single-target or multi-target.