To get Majora’s Mask in Zelda Tears of the Kingdom, you’ll need to defeat five increasingly difficult Lynels at the Floating Coliseum.
Zelda Tears Of The Kingdom, Floating Coliseum & Majoras Mask Guide, EASY
Zelda Tears Of The Kingdom, Floating Coliseum & Majoras Mask Guide, EASY
How to get Majora's Mask at Floating Coliseum in Zelda: TotK - Polygon
Zelda: Tears of the Kingdom - All Coliseums (& What They Reward)
How to farm Lynel Guts in Tears of the Kingdom (TotK) – Destructoid
Zelda: Tears of the Kingdom: every Easter egg and reference in the game - Polygon
How to get Majora's Mask at Floating Coliseum in Zelda: TotK - Polygon
Majora's Mask - The Legend of Zelda: Tears of the Kingdom Guide - IGN
How to get Majora's Mask in The Legend of Zelda Tears of the Kingdom