Before we start, this guide provides information about boss fight only. And you also need to level some of your heroes to get specific skills.

I had struggled about 10 hours and lost against the Hermit crab boss for this achievement. Then, I found the solution which could kill it easily in less than 10 turns as mentioned below;

Party

• Adventurer
  
• Priest
  
• Ranger

For Adventurer

You absolutely need the skill called "Shoot spike" it deals extra 3 damage for each thorn you have. the other skill which make your life easier is "Thorn Defender" it gives you 4 thorn and 4 taunt.

For Priest

You need item that have Fanatic ability which give you x thorn and another 1 thorn to a random ally for each Shield you rolled. Moreover, it would be ideal if you got skills that also generate thorn to your Adventurer. When you level up, seek for it.

For Ranger

You literally do not need this girl but I found her useful due to lots of Backdown skills. It do work quite well to multi-hit attack.


For your understanding just remember that the more thorns you get, the more damage output you can deal. That's it. You can hit boss like a truck since you stack Thorns like 100. My finishing blow to boss is about 500 damage and that crab is gone.

Bon voyage.