The Mysterious Part C is a Key Item in Xenoblade Chronicles 2. It can be found in a buried Treasure Trove in the Genbu Drifts in the Kingdom of Tantal, north of the Central Ether Boulder Skip Travel point, as indicated by the Tantalese Murals, during The Riddle on the Wall. The level 2 "Ice Mastery" and level 4 "Fortitude" Field Skills are required to excavate the chest, and the level 5 "Lock Picking" to open it.
Gallery[]
Approximate location of the Mysterious Part C treasure trove