This is a weekly group instance where you fight off waves of enemies in order to unlock free cards and receive nolan cards used to reward MVP/MINI cards.
Once you reach base level 60, Oracle Dungeon is unlocked from the instance menu.
Oracle Dungeon in the Instance Menu
This dungeon will have you fending off several waves of enemies and traps in an arena. This dungeon has Two difficulty settings (Normal or Elite), each with multiple stages. Completing a stage gives you the rewards from all the stages beforehand so aim to complete the highest stage you can in order to receive the most rewards.
There are always three MVP bosses in each run as well as several effectst that make things harder. After entering the instance, speak to Sigmond and pick View Card to see the deck that was generated for your run. While the MVP monsters are always the same three shown in the instance finder, the order of the deck is randomized every time you enter.
Example of the cards generated for the week
It is common to re-enter a few times until you get a deck layout that is easier to run. Some combo's can be brutal so this is preferable to many wipes.
Once you roll a good deck the party leader can click Start and the fun begins!
The goal is to survive through all 60 card draws and defeat all the monsters. Every 25-30 seconds, or when the last wave of monsters is defeated, the next 3 cards shown on the right side of the screen will be drawn at once.
Cards shown on the right side of the screen will be drawn next
Several cards are trap cards that cause deadly effects such as meteor fall which drops meteors all around the map that will easily one shot you. I've included some examples of deadly traps below.
Pools of fire are spread all throughout the room that deal significant damage if you stand in them.
Every few seconds a meteor targets everyone in the party so you have to move. These are instant death if you don't get out of the way so pay attention when the Meteor card is drawn.
Cast time is increased significantly. This can cause your cast times to go from instant to 30 seconds or more, even if you're an Arcane Master rocking lots of instant cast. Wait for the next wave to count down before casting again so you don't get caught casting a single spell for 2 - 3 waves. This will get you killed by meteors.
You can mount up while casting to interrupt the long cast time of Sand. This only works once so if you mount up and accidently cast again chances are you're stuck casting. This takes some practice but can get you out of a jam.
Once the entire deck is drawn some time will pass until the outside of the circle fills with green acid working its way towards the middle. This will kill you extremely fast so when the deck runs out everyone should run to the middle of the room and kill the boss as quickly as possible.
When the last monster falls you'll receive your weekly rewards. As I mentioned above you receive rewards from easier difficulties so clearing the hardest one you can is advised so you get more rewards instead of needing to run it on a harder difficulty later in the week.
Rewards include:
Nolan Cards (Use at King Poring to roll MINI/MVP cards)
Gram Dust
Oracle Dust
Oracle Crystal
You also have a chance to obtain various card albums. These contain cards, some exclusive to Oracle Dungeon and though you don't get unlocks for opening them you can get several of these on higher difficulties to open and roll at King Poring to get some unlocks.
As I mentioned at the beginning of this article you can spend Lucky Coins upon completion but you will not receive additional Nolan Cards.
DO NOT use your lucky coins on this instance, it is a huge waste!
When double/triple drop events happen for Oracle Dungeon you do not receive double Nolan cards.