Here is the full list of all 86 Astral Ascent achievements.
Defeat 30 Star Guardians
Success an escape at Destiny Level 15+
Reach level 12
Defeat Leo at Destiny Level 6+
Defeat Scorpio at Destiny Level 6+
Unlock all Zim-Zim abilities
Defeat The Master at Destiny Level 6+
Defeat Virgo at Destiny Level 6+
Defeat Libra at Destiny Level 6+
Defeat Pisces at Destiny Level 6+
Defeat Aries at Destiny Level 6+
Defeat Capricorn at Destiny Level 6+
Use your Signature Spell 500 times
8 stones of each type equipped simultaneously
Defeat Gemini at Destiny Level 6+
Open 150 Key Chests
Defeat Cancer at Destiny Level 6+
Defeat Sagittarius at Destiny Level 6+
Defeat Taurus at Destiny Level 6+
Complete 50% of Sire Bapy’s achievements
Defeat Cancer
Buy all items from an Itinerant Peddler
Use 200 Stars in a run
Save all Yalees from the Kingdom
Defeat Leo
Defeat Draco
Defeat Hydra
Upgrade a spell to level 10
Perfect 30 Fight Rooms
Defeat Gemini
Obtain 1000 Quartz in a run
Equip a Zodiac Spell in The Moon Room
Defeat Pisces
Defeat Capricorn
Unlock the Path of Destiny
Face The Master
Reach the Event Horizon
Defeat Libra
Equip an Astral Gambit
Reach the Crimson Highlands
Defeat Scorpio
Summon a Zodiac to support you
Success a Zodiac Challenge
Change a Spell affinity in The Sun Room
Defeat Lupus
Unlock Calie
Reach 1000 damage in one combo
Defeat Sculptor
Defeat Sagittarius
Unlock Octave
Unlock Barbecue
Defeat Pegasus
Defeat Virgo
Captured 5 Astral Spirits
Unlock Oloon
Unlock Papa Yalee
Start 30 escape attempts
Unlock Sire Bapy
Meet Chamaeleon
Reach the Coral Archipelago
Defeat Aries
Equip 4 affinity gambits on a spell
Defeat Monoceros
Find the hidden nest in the Garden
Unlock the Peddler
Reach the Red Barrens
Defeat Taurus
Unlock Zim-Zim
Equip an Astral Aura
Reach the Garden
Obtain 5 Echoes in a run
Your Zodiac sign helps you 3 times
Trigger 12 dialogues on Benches
Unlock all Auras from Barbecue
Unlock all spells from the Peddler
Unlock all Oloon colors
Collect all memory fragments for Papa Yalee
Defeat Aquarius
Defeat Aquarius at Destiny Level 6+
Collect 100 Destiny Fragments
Activate all abilities of the Void Catalyst at once
Upgrade a spell to level 15
Unlock Ayla’s ending
Unlock Kiran’s ending
Unlock Octave’s ending
Unlock Calie’s ending