Here is the full list of all 19 Wizard of Legend achievements. It takes around 15-20 hours to unlock all of the achievements on Windows.
Enter the Chaos Trials in co-op mode
Unlock 99 arcana
Defeat Taffy 5 times
Unlock 99 relics
Unlock 9 outfits
Unlock 3 chaos arcana
Hold 4 cursed relics
Clear the Chaos Trials in 25 minutes
Defeat Master Sura
Unlock 50 relics
Destroy 99 paintings during the Chaos Trials
Unlock 50 arcana
Hold 999 chaos gems at one time
Defeat a boss without taking damage
Defeat Flame Empress Zeal
Land a 50 hit combo on any boss
Defeat Frost Queen Freiya
Defeat Earth Lord Atlas
Complete the Tutorial