Xenoblade Chronicles X: Definitive Edition Guide | How To Unlock and Use Biological Field Skill

A guide on how to unlock the Biological Field tree and use it to find treasures in Xenoblade Chronicles X: Definitive Edition.

Game Guide by Sabi on  Apr 05, 2025

In the Definitive Edition, unlocking field skills has been changed a bit. If you've been wandering around Mira wondering how to scan trees for hidden treasures, I'm here to show you the new steps to get the Biological Field skill.

Chalky Grove Puzzle Solving

Xenoblade Chronicles X: Definitive Edition Guide, How To Unlock and Use Biological Field Skill

"Grove midst gems of jade, a starving beast awaits the blade."

This is about Andrea, the Hungry Hunter, a Tyrant of level 51 that can be found just north of FN Site 402. Andrea is out and about with a group of friends, which makes this a tough fight. It was my plan to punch Andrea and then run away, but I think it would be better to kill her friends first. She is no longer alive, so this first puzzle is solved.

Court of the Forest Gods Riddle Second Puzzle Solving

Xenoblade Chronicles X: Definitive Edition Guide, How To Unlock and Use Biological Field Skill

"In the court of the forest gods, a brood of sentinels here do flock."

Of course, "the forest" means "Noctilum." Because you want to get to FN Site 206 as far north as you can, you'll need flight mode. A group of enemies is sleeping on a cliff directly east of you. You don't have to fight them; just find where the sentinel's nest is and move on to the next puzzle.

Third Puzzle: Drawings of Old Beasts Trace

Xenoblade Chronicles X: Definitive Edition Guide, How To Unlock and Use Biological Field Skill

"Seek a stony shore in fired climbs."

The "stony shore" refers to the small beach around FN Site 5115, which is a long way east of FN Site 515. The "fired climbs" are Cauldros. You need to find six Savage Sketches. As you go up the slope, pick up more items. 

These things are very hard to find. So, if you're having trouble, try changing the time and quickly going back to Site 515. Then, drive up the slope and quickly go back and do it again. I think I had better luck finding them between 3:00 and 4:00 p.m.

Using the Biological Field Skill 

You can now go off and look at trees and other things as much as you want. This one gave me bunny ears, which is cool, I guess.

There you have it! You now know how to get the Biological Field skill in Xenoblade Chronicles X: Definitive Edition.

Also check out our Xenoblade Chronicles X: Definitive Edition Review and other guides below:

Wasbir Sadat

Editor, NoobFeed

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