Here is the full list of all 20 Labyronia Elements achievements.
Enter the World of Fire
Begin Your Quest
Enter the World of Water
Enter the World of Earth
Enter the World of Air
Defeat Leviathan in Aquilus
Defeat Playful Water Fairy in Aquilus
Defeat Crodin in Aquilus
Defeat Tollan in Cindyral
Defeat Abramelin in Cindyral
Defeat Pyros in Cindyral
Defeat Wall of Evil in Nuterra
Defeat Crusher in Nuterra
Defeat Zemocon in Nuterra
Defeat Elder Mistwhale in Anshar
Defeat Death in Anshar
Defeat Buchis in Anshar
Defeat Thanos in Labyronia
Defeat Andras in Labyronia
Defeat Nerubis in Labyronia