To 100 percent your Rethramis Adventurer's Tome, you need to find 15 monsters scattered around the Rethramis region. These monsters are generally harder than other main monsters but nothing a single person couldn't handle.
We've organized the guide in areas, so you don't miss a single one when going through the region.
All monster locations in Rethramis
Loghill
Alpha White Redbeak
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Lead-White-Redbeak.jpg?resize=1024%2C576)
Toxiclaw Explorer
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Toxiclaw-Explorer.jpg?resize=1024%2C576)
Lead Cloclaw
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Lead-Croclaw.jpg?resize=1024%2C576)
Toxiclaw Cavern
Toxiclaw Elite Archer
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Toxiclaw-Elite-Archer.jpg?resize=1024%2C576)
Ankumo Mountains
Lead Moss Wolf
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Lead-Moss-Wolf.jpg?resize=1024%2C576)
Giant Skehal
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Giant-Skehal.jpg?resize=1024%2C576)
Related: Where to find all Monsters in the Yudia region in Lost Ark?
Wandering Infected
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Wandering-Infected.jpg?resize=1024%2C576)
Boss Mystical Snake
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Boss-Mystical-Snake-map-location.jpg?resize=1024%2C576)
Aquilok's Head
Stinky Gravedigger
This monster is located behind a hidden wall in this dungeon. There is a wooden lever to the left side of the screen. It's hard to miss. Activate it, jump down, and you'll encounter the monster.
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Stinky-Gravedigger.jpg?resize=1024%2C576)
Giant Thornwalker
This monster is hidden behind a rock wall. Go to this location and start attacking this wall, and it will break. Proceed further in, and the monster is waiting for you.
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Giant-Thornwalker.jpg?resize=1024%2C576)
Old Mera Snake
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Old-Mera-Snake.jpg?resize=1024%2C576)
Rethramis Border
Boss Gravedigger
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Boss-Gravedigger.jpg?resize=1024%2C576)
Decomposed Infected
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Decomposed-Infected.jpg?resize=1024%2C576)
Boss Brook
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Boss-Brook.jpg?resize=1024%2C576)
Flesh-eating Spider Boss
![](https://vip-develop.progameguides.com/wp-content/uploads/2022/02/Lost-Ark-Flesh-eating-spider-boss.jpg?resize=1024%2C576)
For more guides on Lost Ark, Pro Game Guides has you covered.
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Where to find all Monsters in the Rethramis region in Lost Ark?
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