Death's Touch
Next upComplete Waka Waka (challenge #17).
Start Waka Waka from the Challenges menu and defeat Mom.
Each challenge has its own starting items and rules. The wiki page for the challenge has tips.
Sources:AchievementsChallengesWaka Waka
Achievement
Complete Waka Waka (challenge #17).
In-game: “Unlocked a new item.”
Sources:AchievementsChallengesWaka Waka
Complete Waka Waka (challenge #17).
Start Waka Waka from the Challenges menu and defeat Mom.
Each challenge has its own starting items and rules. The wiki page for the challenge has tips.
Sources:AchievementsChallengesWaka Waka