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