When hitting at least 2 enemies simultaneously, or hitting a boss or player, you gain 1 stack of Stars Align: …
When hitting at least 2 enemies simultaneously, or hitting a boss or player, you gain 1 stack of Stars Align: For 5 seconds, Martial Art Skills deal 3% increased damage and further bonus damage to enemies more than 4 meters away; the bonus increases with distance, up to 1% at 8 meters. Stars Align stacks up to 5 times, and 1 stack is removed each time you take damage. Up to 2 stacks of Stars Align can be gained per second.