Fiend Colony (Mi’ihen Highroad)
The Fiend Colony is similar to the Ruin Depths in that it requires you to complete steps of the Chocobo Ranch side quest to open it up. You will need to send a Level 4 or 5 Chocobo to the Mi’ihen Highroad to unlock this brand new location. For more information on how to complete these steps, check out the Chocobo Ranch side quest page:
Side Quests
Covers catching, raising, and dispatching Chocobos, including how to send a Level 4 or 5 Chocobo to the Mi’ihen Highroad, which is what opens the Fiend Colony.
After you’ve sent a Chocobo, you’ll get a message indicating that a new dungeon has been found in the Mi’ihen Highroad.
Head to the area where the hover crashed (near the 
Save Sphere). You can ride there on a Chocobo to get there more quickly. Select “Yup-yup!” when the option to enter the portal appears.
Why Visit the Fiend Colony?
By the time you can reach the Fiend Colony, there isn’t really much that you need from inside the caves. There are a few interesting rewards, like the 
Arcane Tome, White Tome, and Sword Tome, but none of them are critical.
The most important thing to do in this area is to initiate a battle against King VERMIN!, the final boss at the end of the last corridor. This is the only place you can find this fiend, and you’ll need it to complete Shinra’s Bestiary.
It’s possible to enter the Fiend Colony and maintain an Oversoul. King VERMIN! itself shares a fiend type/family with the Creepers, Hexapods, and Hug Bugs in this area. But even if you don’t fight it in its Oversouled form right here, you’ll be able to fight King VERMIN! again in the Via Infinito.
Navigating the Caves
The premise of navigating through the Fiend Colony caves is that you have to spend an unknown quantity of 
S-Bomb, M-Bomb, and L-Bomb to break through the walls where a message appears saying you can ‘blast through.’
There are two challenges associated with this dungeon: navigating through the confusing corridors and not using up too many bombs before you get to your destination. This is very easy to do, though, if you have a map. And use the table as a guide to help you:
Fiend Colony
 1 | S-Bomb |
| 2 |  Mega Phoenix |
| 3 | Black Tome |
| 4 | White Tome |
| 5 | Elixir |
| 6 | Elixir |
| 7 | Mega Phoenix |
| 8 | Elixir |
| 9 | Sword Tome |
| 10 | Turbo Ether |
| 11 | Arcane Tome |
Helpful Hint
Did you run out of bombs and accidentally use too many? This is unlikely, but if you do make a mistake, you can replenish your supply in two ways. You can use 
Lady Luck’s 
Bribe command to bribe the enemies right here in the Fiend Colony. You should bribe approximately the following gil:
| Fiend | HP | Bribe | Gives |
|---|---|---|---|
| Creeper | 1,974 | about 12,338 gil | S-Bombs |
| Hug Bug | 2,350 | about 14,688 gil | M-Bombs |
| Hexapod | 2,805 | about 17,532 gil | L-Bombs |
You can also just fight the enemies in this area directly. The bugs here will drop all the bombs you need to complete the side quest.
Before you initiate the final boss battle, make sure you equip your party members with items or Dresspheres that protect against Sleep and Fire damage. This includes 
Twist Headbands, 
Ribbons, the 
Restless Sleep Garment Grid, Crimson Rings, Sublimators, and so on, as they will make the battle much easier.
Reaching King VERMIN!
Once you reach the end of the cave, you’ll trigger a battle against…
Boss Battle
The battle against King VERMIN! starts with an ambush, giving it the first attack and putting you on the back foot from the start. It will use the following attacks:
Normal Form:
Oversoul Form (also gains these):
Holy, Flare, and Demi, which are all incredibly strong magic attacks- A triple physical attack that deals damage three times
You can cast Reflect on your party members to make this fight much easier, because this boss relies on heavy magic damage to deal damage to your party. Get Reflect active and then use a 
White Mage to cast 
Pray, or have an 
Alchemist use their Mega-Potion ability to heal through the Reflect.
| Enemy | HP | Steal | Drop |
|---|---|---|---|
| King VERMIN! | 39,857 | Turbo Ether (common)Turbo Ether ×2 (rare) | Power Gloves |
| King VERMIN! (Oversouled) | 41,850 | Turbo Ether ×2 | Champion Belt |
After defeating the boss, you’ll receive Power Gloves or a Champion Belt depending on whether it was Oversouled, as well as a Font of Power Garment Grid, and you’ll automatically be transported back out of the dungeon.
The Fiend Colony is complete!