This achievement is missable!
When you're coming down the mountain from the monastery("Chosen by Fire and Shadow")you'll meet a man named Bartur who gives you a quest that requires you to find seeds and bring them to Jabo.
You'll find those seeds in the dark gorge you have to traverse before reaching the jungle, simply always keep left(west) while walking through the gorge and you'll find them.
Then after you've entered the jungle you won't really be able to go anywhere but straight north, keep going once you get to a teleporter and a dungeon entrance until you run into Jabo.
You can then give him the seeds and he will ask you to get rid of a guard dog he got to protect his vegetables.Follow the quest marker further north where you will get to fight said "guard dog".
Hand in the quest afterwards and you'll get the achievement.