Below is a walkthrough for A Small Favor side quest in Tiny Tina’s Wonderlands. To obtain this quest, interact with the bounty board near the vending machines in Brighthoof.
Talk to Zoseph
Travel to Tangledrift then make your way to the town where you’ll find a portal that will take you to the objective on the eastern side of the map.
Speak with Zoseph at his house then follow him and enter the portal.
Enter basement
Once inside the house, defeat the enemies then head down to the basement. To reach the basement, jump into the guy’s hand then follow the path around to reach a hanging cage. Jump on it to cause it to fall then use it to reach the basement via the wall.
Investigate ritual
Examine the scroll on the floor.
Kill Kastor the Normal-Sized Skeleton
Defeat the boss!
Leave Zoseph’s house
Enter the portal on the northwest side of the room to leave the house.
Talk to Zoseph
Speak with him to complete the quest.