Final Marcus

Final Marcus is one of the superbosses found in Xenoblade Chronicles. It is a Unique Monster that is a member of the Slobos family. It can be found at the Three Sage Summit, in Valak Mountain at night and when the weather is clear or snowy. Unlike the other superbosses, it is immediately present in the area rather than appearing after events of the Mechonis Core. It can drop the Yellow Slobos Rock needed for the "Replica Monado 5" quest.

Chests rates

 * Wood = 0%
 * Silver = 0%
 * Gold = 100%

Wood

 * Materials
 * Yellow Slobos Rock - 85%
 * Veritas Glyph - 15%

Silver

 * Crystals
 * Chill Attack V / Spike V - 50%
 * Chill Attack V / Spike Defence V - 50%

Gold

 * Unique Weapons
 * Agape - 7.4%
 * Chosen One - 6.9%
 * Rigel Hand - 6.1%
 * Alcor Staff - 5.1%
 * Infinity - 3.1%
 * Unique Armors
 * Glory Gear - 13%
 * Glory Gauntlets - 12.7%
 * Glory Boots - 12.1%
 * Glory Leggings - 6.9%
 * Glory Armour - 2.8%
 * Advanced Books
 * Freezinate - 10.9%
 * Back Slash - 7.3%
 * Sneaky - 3.9%
 * Electric Gutbuster - 1.8%

Trivia

 * Final Marcus spawn location is nearby Avalanche Abaasy, and it is possible for the party to fight both superbosses at once, provided both of their Spawn Time conditions are met.