[Arts] Freeze Bullet: Fog

* [Freeze Bullet] creates a fog during the buff that chills and eventually freezes enemies.{nl}* Enemies within the fog continuosly gain stacks of the [Chill] debuff.{nl}* Enemies under the [Chill] debuff are slowed, and will be [Frozen] for 2 seconds upon reaching 4 stacks.{nl}