Here is the full list of all 16 Ancient Guardians: The Dragon achievements.
Unlock and upgrade to level 3 all fire skills.
Unlock and upgrade to level 3 all winter skills.
Unlock and upgrade to level 3 all darkness skills.
Unlock and upgrade to level 3 all lighting skills.
Unlock and upgrade to level 3 all wind skills.
Defeat the fire boss.
Defeat the winter boss.
Gather the four fairies.
Hit 100 enemies with Meteor Summoning.
Deal 40000 damage with Bring Winter.
Corrupt 200 enemies with Corrupting Darkness.
Kill 150 enemies with Discharge.
Heal 9000 HP with Tornado.
Defeat the dark boss.
Stun 175 enemies with Earth Lifting
Unlock and upgrade to level 3 all earth skills.