Below is a walkthrough for the On Wings and Dreams side quest in Tiny Tina’s Wonderlands. To obtain this quest, speak with Peretet in the Overworlds.
Reach dungeon
Follow the objective to the dungeon and enter it. You’ll have to complete 2 encounters then loot the Essence of Evil from the chest.
Talk to Peretet
Afterwards, enter the portal then return to Peretet and speak with him. Afterwards, the quest will complete