To begin the quest, talk to Phoenix Artemis in Swan Lake Basin (X:216 Y:161). He will give you a Core of Sunbird.
FIGHT: He will try show off the Heaven Spirit Spell, but it goes wrong. You will enter an instanced fight with Dead Adolf, Disease Lucifer, and Zombie Cain (all level 30 Shamans, Metal), which will all attack Phoenix Artemis. This must be soloed and they can hit rather hard, so bring a pet or heals with you.