Here is the full list of all 100 Choice of Magics achievements.
Become a Saint immune to rot.
Have all your friends gathered around you at your deathbed.
Dismiss the voice as impossible.
The Magisterians revolt.
Get back the things the Magisterians took from you.
Be nice to the tortoise.
Turn into an animal permanently.
Make all Vivomantic creatures tiny.
Store a whole lot of energy.
Convince the Magisterians to halt your execution.
Allow yourself to be captured to ensure your Neighbor friend goes free.
Help the kingdom live above the clouds.
Marry your student friend.
Conquer the Magisterian Empire.
Help Cos win re-election.
Become the most well-loved ruler of Eirinia of all time.
Become a great creature.
Your allies appear to have bred like rabbits.
Dear nemesis: be more specific.
Whoa.
Create a great creature.
Ride a dragon.
Buy a fateshaper in Chapter 5.
Make off with an armful of books from the Cathedral.
Return the remains of the student's staff to the student.
Clear the eternal clouds above the world.
Queen Thecla marries her ideal knight.
Have or adopt a child.
Become Hierophant.
Disobey the voice.
Blessed Jacob gives you some paintings he made.
Learn of Saint Ann's fate.
Marry Sam.
Prevent the war with the Magisterians from starting.
Convince the Magisterians that you have performed a miracle.
Become the queen's Blessed Advisor.
Become a Saint.
Sam became a Saint.
Your student friend is becoming a Saint.
Become the ruler of Eirinia.
Play God.
Become immortal.
Marry Cos.
Wear one of the milliner's finest creations.
Saint Twimsby becomes Hierophant.
Get Noodles to paint Hell in the Cathedral dungeon.
Slay the executioner golem.
Akriton celebrates the end of the Negative Sea.
Create empathic bonds between Eirinians and Magisterians.
Use divination to send a call for help from the Empire.
See an interesting landmark with Cos.
Help a student create a working magical item.
Turn in the Magisterian spy.
Decipher all passages in the ancient history book.
An ally kills the Hierophant.
Find the secret room in the Cathedral.
Help Seer Marie find a calling as a Saint.
Defeat the Watcher.
Survive the Hell room of the Cathedral dungeon.
Take control of the executioner golem.
Teach Sam magic.
Hatch a baby dragon.
Get a fateshaper in Chapter 3.
Have a lovely night in the Mild Woods.
Play Cos's board game.
Restore the copper tree of Akriton.
Get a weird pet.
Wear a pointy wizard hat.
Survive the resolution of a Chapter 8 climax.
Wipe the Magisterian Empire off the map.
A student project helps avert an environmental catastrophe.
Make inroads into the Magisterian Empire.
Use maximally destructive negation weapons.
Your reconaissance mission is a success.
Harness the power of the dark sun.
Seer Marie hints at magics greater than the five schools.
Stop the death cloud from ravaging Akriton.
Get a golem servant.
Make a herd of greathogs fly.
Use divination to save an individual from the death cloud.
Teach Seer Marie real magic.
Turn someone into a tortoise.
Obey the voice.
Marry Tal.
Pilot an airship.
Comfort the Neighbor.
Free Cos from the Cathedral.
Visit the laboratory, arena, or auditorium from the other direction.
Free the specter.
Reach the resolution of a Chapter 8 climax.
Your student acquaintance starts a magic academy.
Marry Queen Thecla.
Correctly guess the ending to the queen's story.
Convince the queen to use glamor magic.
Get Noodles to paint Heaven in the Cathedral dungeon.
Free the student from the Cathedral dungeon.
Contribute musically to the town celebration.
Stop the thief in the market without being noticed.
Get the dead actor's rings.
Find a luxgladius.