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