Here is the full list of all 30 Mages of Mystralia achievements.
Use a Scarab during a boss battle
Complete the Dark Tower in under 10 minutes without dying
Fully upgrade your health
Create a spell that uses all four elements
Reach 100% completion
Fully upgrade your mana
Complete the Ghost Buster quests
Defeat 10 enemies with your clones
Find every wand
Find the Mystralian Elixir
Find all the runes
Defeat the Councillor
Earn the Igni mastery
Find 60 chests
Defeat an enemy with an Actus spell with a Left or Right rune from far away
Use a Teleportation Anchor 5 times in one adventure
Earn the Gaea mastery
Collect a total of 2500 green soulbeads in one adventure
Earn the Aqua mastery
Earn the Aura mastery
Defeat the Ghost Queen
Have a conversation with 30 NPCs in one adventure
Destroy a total of 1000 objects in one adventure
Defeat 5 goblins with the same spell
Make a Boar-Rider defeat an ally 5 times in one adventure
Defeat 500 enemies in one adventure
Defeat the Ice Lizard
Defeat the Giant Wood Wretch
Defeat the Goblin Champion
Stay on your Creo spells for 2 minutes without touching the ground