Once you have beaten Ochu you can leave to the Historia Crux and come back to talk to Tipur and accept this. Change the weather to Stormy and then grab a Chocobo to reach the waypoint in Grave Ridge.
Yomi is the sole source of Trapezohedron, which you will need to purchase the Sagittarius and Mac an Luin weapons.
| HP | 1,200,000 | Chain Res. | 40 | Physical Dmg. | - |
| Strength | 705 | Stagger Pt. | 300% | Magic Dmg. | - |
| Magic | 705 | Keep | 95 | Fire Dmg. | 1/2 |
| CP | 20,000 | Launch | Immune | Ice Dmg. | 1/2 |
| Gil | 48,000 | Libra | 1,000 | Lightning Dmg. | 1/2 |
| Wind Dmg. | 1/2 | ||||
| Common Drop | Tear of Woe | 40% | |||
| Rare Drop | Trapezohedron | 5% | |||
Before you even consider fighting Yomi, you should be max level and probably use Physical or Magical Resistance accessories.
- The weapons dropped by Immortal will help you considerably in this fight with their ATB Rate: +50%.
- Any SEN with lots of HP is required, but Bunkerbeast will probably be yours if you haven't made ultimate tamed monsters.
- A high-level SAB (likely Dendrobium) with Wound and Poison is a must.
- Make sure your SYN has Bravega and Faithga. I suggest Yakshini, but you can always supplement this with whatever you want.
Start the battle by casting Vigilance, Protect, Shell, and Veil on everyone while your allies cast debuffs on Yomi. This will take you midway through the first Impenetrable Aura. From now on, after every Impenetrable Aura you need to switch to Infiltration (SAB x3) and Poison Yomi. Poison is where most of the damage will do, since you can not attack him during his Aura, but Poison can.
Once Poison is active, shift to Convalescense-W (MED, ME, SYN) to heal all that damage and get Bravega and Faithga. If you are lucky and Yomi hasn't cast another Impenetrable Aura, switch to an attack paradigm. When Yomi goes for Impenetrable Aura, heal up and then Poison him again.
Continue this pattern until about halfway through the fight when Yomi starts to use Wicked Whirl. When you see this notification, switch to Tortoise (SEN x3) straight away. Then heal up and continue the pattern.
The first time you beat Yomi you will get the Yomi Fragment and 30,000 CP.
