Zodiac Weapon
To obtain all of the items, players need: over 400k gil, 80k Company Seals, 6400 Allagan Tomestone of Soldiery, drops from 16 dungeons, 8 ★★★ 
crafted items, many desynthesized items and some miscellaneous items. These span over 4 different quests.
The following are the Zodiac Weapons introduced in patch 2.4:
Excalibur
Lv50 | Gladiator's Arm
Aegis Shield
Lv50 | Shield
Nirvana
Lv50 | 2H Conjurer's Arm
Lilith Rod
Lv50 | 2H Thaumaturge's Arm
Ragnarok
Lv50 | Marauder's Arm
Last Resort
Lv50 | Arcanist's Grimoire
Sasuke's Blades
Lv50 | Rogue's Arms
Longinus
Lv50 | Lancer's Arm
Yoichi Bow
Lv50 | Archer's Arm
Apocalypse
Lv50 | Arcanist's Grimoire
Kaiser Knuckles
Lv50 | Pugilist's Arm
This quest rewards players with the following:
Perfect Mortar
Perfect Pestle
Zodium
Guiding Star (6,21)
Mor Dhona
Mor Dhona
Purchased Materials
Crafted Materials
Perfect Mortar 
Lv50 ★★★ | Armorer
Perfect Pestle
Lv50 ★★★ | Blacksmith
Dungeon Materials
This quest rewards players with the following:
Perfect Vellum
Perfect Pounce
Zodiac Scroll
Adkin (23,13)
Central Thanalan
Central Thanalan
Purchased Materials
Crafted Materials
Perfect Vellum
Lv50 ★★★ | Leatherworker
Perfect Pounce
Lv50 ★★★ | Alchemist
Dungeon Materials
This quest rewards players with the following:
Furnace Ring
Perfect Firewood
Book of Skylight
Papana (7,22)
Mor Dhona
Mor Dhona
Purchased Materials
Crafted Materials
Furnace Ring
Lv50 ★★★ | Goldsmith
Perfect Firewood
Lv50 ★★★ | Carpenter
Dungeon Materials
This quest rewards players with the following:
Tailor-made Eel Pie
Perfect Cloth
Flawless Alexandrite
Brangwine (6,21)
Mor Dhona
Mor Dhona
Purchased Materials
Crafted Materials
Tailor-made Eel Pie
Lv50 ★★★ | Culinarian
Perfect Cloth
Lv50 ★★★ | Weaver
Dungeon Materials
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