This is a list of Aionios' Strongest unique monsters in Xenoblade 3. This guide includes all of the spawn locations of the 5 strongest unique monsters in Aionios and their rewards.
Table of Content
All Unique Monster Lists & Locations
What Is Aionios's Strongest?
Currently The 5 Strongest Unique Monsters
Aionios's Strongest are the 5 strongest unique monsters in the world (Aionios), and they are counted up to 5/5 when defeated. As their name goes, they are monsters with an average of over 100 levels, so let's upgrade our characters before taking on the challenge.
Aionios's Strongest Unique Monsters List
| Unique Monster | Levels | Spawn Location |
|---|---|---|
| 95 | 【Fornis Region】 Erythia Sea | |
| 100 | 【Aetia Region】 Coolley Lake | |
| 102 | 【Cadensia Region】 Malevolent Hollow | |
| 105 | 【Pentelas Region】 Maktha Wildwood | |
| 110 | 【Cadensia Region】 Southern reaches of Erythia Sea |
Kilocorn Grandeps Lv95
| Fornis Region (Rae-Bel Tableland) | Nearby Landmark (Saffronia Tree) |
|---|---|
 |  |
The Kilocorn Grandeps appear in the forest northwest of the Fornis Region landmark Saffronia Tree landmark. It may appear only on cloudy days, so if you don't see it on Map, try to make it cloudy.
Perilwing Ryuho Lv100
| Aetia Region （Coolley Lake） | Nearby Landmark （Coolley Lake） |
|---|---|
 |  |
The Perilwing Ryuho appears south of the Coolley Lake landmark in the Aetia Region. It is flying in the sky, so use R1 or L1 to select a target and attack.
The King-Kings: Conqueror Deepwan and King Krawkin Lv102
| Cadensia Region （Demihuman Gutter） | Nearby Landmark （Searing Strand） |
|---|---|
 |  |
The King-Kings can be found in the Demihuman Gutter in the Cadensia Region, just east of the submarine landing at the Searing Strand landmark and proceeding south to the far end of the Erythia Sea. Also available in the back are Accessories, one of Legacy of the Seven.
Accessories Available At The Back
| Accessories | Effect |
|---|---|
| Solis Rings | Healing Power is increased by 40% of the original |
Dreadwyrm Nizoont Lv105
| Pentelas Region （Low Maktha Wildwood） | Nearby Landmark （Forgotten Trick Gate） |
|---|---|
 |  |
Dreadwyrm Nizoont appears in the extreme southeast of Low Maktha Wildwood in the Pentelas Region. After defeating them, go to the back to obtain one of the strongest Accessories for Defenders.
Accessories Available At The Back
| Accessories | Effect |
|---|---|
| Legendary Biter | Gains a little aggro every second. (aggro effect extra large) |
High Sea Dragon Envirio Lv110
| Cadensia Region （Erythia Sea） | How To Get There By Submersible （Go to the east end of the Map） |
|---|---|
 |  |
The high sea dragon Envirio appears in the Erythia Sea in the Cadensia Region, just to the edge of the eastern Map by submersible boat, at the place where it landed through the gap between the rocks in the second image.
Aionios's Strongest Unique Monsters Reward
Hidden Unique Monster Appears After 5 Monsters Are Destroyed
After destroying all five of Aionios's Strongest Unique Monsters, discuss the information that there is a very strong monster in Swordsmarch to unlock the quest for the hidden unique monster.
The Strongest Unique Monster To Appear In Swordmarch
After listening to the information in the Discussion, go to the center of Great Sword, Upper, and an event will occur. It is the strongest unique monster in this game, so make sure to look at it in its full glory in-game.
Related Articles
| Story Walkthrough | Missable Contents |
| Unique Monster Locations | Leveling Guide |
| Beginner Tips | Best Arts Guide |
| Characters List | Heroes List |
 | All Class List |
 | Class Rank Guide |
 |  |
Must Read Before Buying
| DLC & Expansion Pass | Game Length |
