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