The Final Marcus (Japanese: 終世のマークス, Shūsei no Mākusu) is one of the five Superbosses in Xenoblade Chronicles. It is a Unique Monster and a Slobos found at the Three Sage Summit, in Valak Mountain at night (clear or snowing). Unlike the other superbosses, it is immediately present in the area rather than appearing after events later in the game. There are two Gloria Slobos by his spawn location, although both they and Final Marcus can be lured away individually to a safer place for battle. The nearby Slobos are will not join the battle unless they catch the party in their line of sight. The nearby, though comparatively low-leveled, Reef Nebulae may also join the battle if an ether attack is used while the party is at a low enough level or if hit with an attack that hits multiple targets. It can drop the Yellow Slobos Rock needed for Replica Monado 5.
Marcus' spawn location is nearby Avalanche Abaasy, and it may be possible for the party to fight both of them at once, provided both of their Spawn Time conditions are met.
|Thrust||Physical||3.3 - 3.5||1||Single||-||Yes||-|
|Light of Demise||Ether||3.8 - 4.0||1||Frontal Arc||Bind|
|Mountain Impact IX||Talent (Physical)||3.5 - 3.8||1||Single||Confuse||Yes||-|
|Strengthening Will ※||Status||-||-||Self||Strength Up|
Physical Defence Down
|Iron Will ※||Status||-||-||Self||Strength Down|
※ Single use only. The Final Marcus will use one of the two arts at the beginning of the battle.
|Break||100% ‡||Lock-On||0%||Physical Def. ▼||0%||Agility ▼||100%|
|Topple||100% ※||Bind||0%||Ether Def. ▼||0%||Aura Seal||0%|
|Daze||100% ※||Paralysis||70%||Strength ▼||0%||Arts Seal||70%|
※ Except under certain conditions
‡ No resistance during a chain attack
|Advanced Art Books|