Complete the indicated task to unlock the achievement.

Achievement	How to unlock
Dark Matter	Defeat Lord Rorschachus.
Frost of Your Soul	Defeat Lord Replikus.
Heavenly Host	Defeat Lord Saintus.
Napalm of Phoenix	Defeat Lord Palmicus.
Thunder Fang	Defeat Lord Sigurdicus.
True Heart	Defeat Lord Heartus.
Willing to Live an Eternal Death	Defeat Lord of Universe.