Book of Creating Star

Book of Creating Star uses the power of the universe to create a imitative star with a high gravitational field. Can only be used in WoE and PVP mode. When the caster enters the gravitational field, the movement speed of all enemies is reduced by 90% and deal damage to enemies at constant intervals.
 * [Level 1]: last 6 seconds / Area of effect: 5 x 5 / Number of attack: 12 times
 * [Level 2]: last 7 seconds / Area of effect: 5 x 5 / Number of attack: 14 times
 * [Level 3]: last 8 seconds / Area of effect: 5 x 5 / Number of attack: 16 times
 * [Level 4]: last 9 seconds / Area of effect: 5 x 5 / Number of attack: 18 times
 * [Level 5]: last 10 seconds / Area of effect: 5 x 5 / Number of attack: 20 times