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