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