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