To be God : Requirements: lvl 1000; Green Fairy (lvl 800+ loyalty 100)

First get a Amrita Pill (loot in Brass Grottos2). Find Fairy of Cloud in the Sitting room. She'll give you a GdAdvancingDrug. Take the drug to advance.

To be Devil : Requirements: lvl 1000; Gludinosaur (lvl 800+ loyalty 100)

First get Evil Powder (loot in Hua Mountain Peek). Find Dragon of Hell in Lattern Hell. He'll give you a DvAdvancingDrug. Take the drug to advance.