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.
Defeat Taffy 5 times
Destroy 99 paintings during the Chaos Trials
Hold 4 cursed relics
Enter the Chaos Trials in co-op mode
Unlock 3 chaos arcana
Unlock 99 arcana
Unlock 99 relics
Land a 50 hit combo on any boss
Unlock 50 arcana
Unlock 50 relics
Clear the Chaos Trials in 25 minutes
Defeat Master Sura
Defeat Earth Lord Atlas
Defeat Frost Queen Freiya
Defeat Flame Empress Zeal
Defeat a boss without taking damage
Hold 999 chaos gems at one time
Unlock 9 outfits
Complete the Tutorial