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