The barrier level is shared across all char from the same account
Guide
1
Generate the instance by talking Dimensional Prison at /navi t_garden 172/235
2
Talk to Rigel inside the Dimensional Prison and choose the Barrier level.
Note:
If you fail to finish selected barrier level, your barrier level will decrease by -1
If you didn't raise barrier level / claim reward / leave the instance from portal device, your barrier level will decrease by -1
3
The fight started with Phase 1. Shining square will start to appear and if you inside the square, you will get marked.
4
Block Seal skill will make your char imprison inside floating bubble and you will be unable to attack or move.
After some time, another skill will casted randomly: Aimed Shower, Blazing Eruption, Block Explosion.
5
The Rigel will normally receive damage before any gimmick started. Damage her as much as possible. She will also cast Deadly Projection that will make your magic immunity void. Rigel also cast Seed Trap on the ground and will explode after 3 seconds and will deal huge damage to nearby area.
6
Traps will start appearing after some time. Avoid getting hit by the traps. Depens on the barrier level, you can get instantly killed by the traps and each trap will increase Rigel defense and heal ammount.
7
During the fight, invisible monster will spawn at 4 inner square of the battle area. You can damage and kill the invisible monster. If the monster alive, it will cast Wide Leash and you will be sucked into closest inner square. There's no way to avoid this mechanic except by killing the invisible monster that will keep spawn from time to time.
8
During the fight in Phase 1, a dimensional portal will appear, and Rigel will regain defense boost. If your DPS are high enough, you might keep attacking Rigel. If not, go inside the portal and kill Rigel illusion inside.
9
Depens on the barrier level and the traps your party step on, the amount of Illusion will increase. During this time, Rigel will heal, and it will increase as many as Player inside illusion area, so you must do it quickly. Beware of the shining square inside Illusion area, Grand Judgement will appear randomly on that shining square block. After killing all the Illusion, a dimensional portal in the middle of the area, go there to warp to the main battle area quickly.
10
Rigel will get Groggy and got her defense reduced back. You got 10 second to damage her as much as possible as she will just stand still and can't attack. When you killed her, she will respawn and you entering Phase 2.
11
During phase 2 battle, large square pattern (Sanctuary) will appear below Rigel and it will make she invincible. Lure her outside the Sanctuary to damage her again. All the mechanic from phase 1 also happens on phase 2 except for the Rigel Illusion.