The being passes into another dimension to avoid damage for one round but halves its damage when attacking another creature. This ability is acquired at 1st level and can be used once per long rest. At twelfth level this can be used twice per long rest and at 16th level it can be used twice per short rest.

At 8th level the Ethereal being gains the ability to see the future a few seconds forward. This allows the player to gain advantage on saving throws and +1 to AC. It can be used once per short rest.

Using the Mystic points acquired at each level you can perform transformations on objects and spells within the vicinity. Mystic points are replenished after a long rest each time. However if you use the mystic transformations you may not receive Ability Score improvements from your class. The transformations are as followed

Mystic points at each level are as follows 5th level: 4 points and +1 for each level after until 13th. 13th level: 12 and +1 for each level until 20th. At 20th level you have 24 mystic points and regain half of them rounded down when performing a short rest.

Transformations

5th level

Mystic blast 2 points: You alter a cone or cube spell to increase the width and length by 10ft

Mystic illusion 2 points: You cause a minor illusion from scratch or allow a minor illusion spell to be cast twice for a single spell slot

Mystic beam 2 points: You alter a line spell to cause a fluctuation in power to add a d4 extra to the damage

8th level

Cataclysm 5 points: You drastically change the effectiveness of a spell by increasing its damage by one d10

Mystic Transformation 7 points: You cast Polymorph on yourself

13th level

Form alter 10 points: You alter your physical ability by doubling all movement stats and get advantage on dexterity and strength saving throws or skills that involve dexterity or strength

Etherealness 10 points: You add 5 to all stats for 1 hour and gain 1 extra spell slot for each level

20th level

Mystical Transformation 24 points: All stats are increased by 5, all movement speeds are doubled, you gain 1 extra spell slot for each level, and gain advantage on rolls to hit, checks, and saving throws.

You gain resistance to all bludgeoning, piercing, and slashing that is nonmagical.

Gain a +1 to Charisma, dexterity, and intelligence