The time limit is 45 minutes and there are no time extensions.
Limbus Zone Notes
All avatars as well as Carbuncle use their respective 2-hours and are immune to Stun.
Each elemental has an additional effect enfeeble associated with an ailment of its element.
All elementals can transform into their associated avatar. However, if killed in the correct order only one avatar must be defeated.
An elemental will transform into the associated Mystic Avatar of the same element when the elemental of the element it is weak to has been defeated. For example, defeating Water Elemental will transform Fire Elemental into Ifrit.
In order to avoid fighting all but one of the avatars, after killing the first elemental, you must continue to defeat the elementals in order of reverse strength (counter-clockwise order on the map). For example: after killing the Water Elemental, the Thunder Elemental must be defeated next. Using this strategy only the last mob will spawn an avatar.
Because of the double light weather in the area, Carbuncle's Searing Light may occasionally do exceptionally high damage. Forms of magic defense/magic taken, light resistance, or other damage reduction are recommended.
Note: Carbuncle has exceptionally high damage taken resistance upon first entering the zone; this is progressively weakened by defeating the six elementals/avatars scattered around the zone.
When Carbuncle and the Light Elementals are defeated, the final item crate will spawn with completion contents in the center of the area.