(1) By completing a dungeon, there is a small chance that you will obtain the associated item.
(2) The Main Quest goes under your Journal under Completed Side Story Quests
(3) It
costs 400,000 gil to get the merchant-sold materials (Brass Kettle, Allagan Resin, Bronze Lake Crystal)
(4) It
takes 6,400 tomestones of soldiery to gather all of the Sacred Spring Waters
(5) It
takes 80,000 grand company seals to gather all of the Bombard Cores
(6) You *DO NOT** need to equip your relic weapon to get the drops from the dungeons! (4:04AM PST-12/9)*
(7) You can be on another job/class and still get the item drops from the dungeons.
(8) You
cannot progress further ahead in a given subquest and get the dungeon drops (You cannot go into Hullbreaker Isle and get the blood without have completed the Copperbell Mines part prior).
(9) (See above FAQ as well) You cannot begin the grind for dungeon items if you have not started the quest. That means you cannot try and get the items with your highest relic upgrade being the animus.
(10) You CAN do this quest like most of the prior relic quest lines and stock up on the items for another Job's/Class's relic.