If you want to get anything from the Spirit Ace page, you must pass the Barrier Of Entry for the Spirit Archetype. this means you need:
Tier 2 Spirit Art Maker, +5 Wisdom & Spirit Bonus
Enlightenment
Requires Barrier Of Entry : Spirit
You have reached a new summit of understanding about yourself and the OuterWorlds itself.
Use battle points after fights to unlock permanent upgrades to your spirit abilities.
Mystic Discipline | 2 Points
Requires Enlightenment and Elemental Discipline
Elemental Discipline now includes the elements of other technique makers that you’ve seen, not just elements like fire and water.
Teleportation | 2 Points
Requires Enlightenment
You gain a version of the psychic step ability from the Psychic Abilities, but use wisdom to scale your telepathy range instead of intelligence.
(Getting this doesn’t mean you can get other psychic abilities)
Energy Shield | 2 Points
Requires Enlightenment and Spirit Guard
As long as Spirit Guard is still active, meaning you have at least 1 ki point remaining, you have resistance to all forms of physical damage.
Wrapped In Light | 4 Points
Requires Energy Shield
As long as Spirit Guard is active, meaning you have at least 1 ki points remaining, you have resistance to any form of damage that you have personally used through spirit.
Spirit Control | 2 Points
Requires Enlightenment and Elemental Discipline
As a free action when using a spirit art, you can spend a varying amount of ki points to alter the effects of the spirit art itself.
Hax | 4 Points
Requires Full Power!
When asked to roll a saving throw, you can use spirit instead of whatever was originally asked of you.
Telepathy | 2 Points
Requires Enlightenment
You gain a version of the telepathy ability from the Psychic Abilities, but use wisdom to scale your telepathy range instead of intelligence.
(Getting this doesn’t mean you can get other psychic abilities)
Extraplanar Mind | 4 Points
Requires Telepathy
As long as you’ve seen the creature with your own eyes, your telepathy can reach them regardless of distance or being in alternate dimensions.
Mind Reading | 4 Points
Requires Extraplanar Mind
You gain a version of the mind link ability from the Psychic Abilities, but use wisdom to scale your mind link range instead of intelligence.
(Getting this doesn’t mean you can get other psychic abilities)
Key To Power | 4 Points
Requires Mind Reading
As a free action once per turn, choose a creature that you can sense with spirit. They can now add your spirit bonus to a roll of their choice.
Spirit Clone | 4 Points
Requires Enlightenment
You gain a version of the cloning ability from the Summoner Ace Abilities, but you are required to use ki points to create the clones.
Full Power! | 4 Points
Requires Enlightenment and Transformation
Transformations no longer cost ki to use, also double the buffs that transformations give you.
Inner Soul | 2 Points
Requires Enlightenment
You have made your heart vulnerable in exchange for greater spiritual power. At times of extreme emotion, roll a charisma will save. Upon a success you gain the positive soul benefits, on a failure you gain the negative soul benefits:
Positive: Spirit Art rolls are now at advantage.
Negative: Physical attack rolls are now at advantage, but you have disadvantage and a -5 rolling for spirit arts.
Mastery Of The Light | 4 Points
Requires Inner Soul and you must go through meditation to temper the light in your heart.
When not experiencing extreme emotion, you retain the positive soul benefits. However, upon experiencing extreme emotion you must roll the charisma will save for Inner Soul.
Mastery Of The Dark | 4 Points
Requires Mastery Of The Light and you must go through mediation to master the darkness in your heart.
You now have the positive and negative soul benefits without needing to experience extreme emotion. Also, the negative soul benefits no longer include the -5 and disadvantage to Spirit Art Rolls.
Afterlife Gaze | 4 Points
You gain this after getting all of the other abilities under Enlightenment
During a short rest, you can use your telepathy to peer into other dimensions.
This includes those dimensions’ afterlife’s and even the Sea Of Souls. You can attempt to drag a soul from either of those back to your dimension, but you must have an intact body prepared and rolling badly on Spirit can result in the destruction of the soul.