Immortals Fenyx Rising

This one's a grind. You're going to need a ton of golden ambers for this to fully upgrade the potions. To upgrade, click on the purple vase in the overworld or at your home base at Valley of Eternal Spring. It's in the middle and has a "skill tree" of sorts for each individual potion. This was my last achievement and there are a couple of ways you can go. The gameplay method is just by opening every regular chest you can find as they grant 3 ambers each. Epic Chests or ones that are guarded do not. Don't waste time like I did. They are also found in trees so anytime you pass by a tree and see a glow near the base, swing away with the axe to cut it down and pick up the amber. This brings me to the method I used. Find any group of trees that you can cut down with the axe, and start swinging. It doesn't matter if you see the glow or not. Sometimes, there will still be an amber at the bottom. Cut down as many as you can within a small radius of where you're at. After you're done cutting, pick up all the ambers on the ground and go to your inventory menu and press up to Quicksave. After this, load the save you just made and repeat this process. Sometimes, you will get lucky and get a 3 to 5 ambers in a single go. Sometimes, nothing. For reference, I needed 87 ambers after completing all other achievements, and using this method it took me a solid hour of farming. I used a spot in Clashing Rocks on the furthest south eastern island where there was a ton of trees grouped together. Don't go too far out of your way to knock down trees. The key is to find a group of say, 10 to 15 trees and keep using them over and over.

Notes-According to Glitterlicks and Flatline in the comments, The Gates of Tataros seem to be a viable/good spot for doing this too.

To unlock this achievement you need to upgrade every node in each tree for each potion (Health, Attack, Defense, & Stamina):



To do so will take a total of 308 Golden Amber. As mentioned in previous guides, it's highly encouraged that you collect all Regular Chests throughout your playthrough to cut down on any grinding you may have to due post-game. Each chest rewards you with 3 Golden Amber.

For chest locations, you can use this interactive map: https://mapgenie.io/immortals-fenyx-rising/maps/golden-isle

It's also encouraged that you chop down any glowing trees that you pass by throughout your playthrough. Doing so will help you with:



Glowing trees look like this towards the base:



As mentioned in previous comments, once you obtain the Chest Piece "Love's Embrace" it will help with farming the necessary Golden Amber. Wearing the chest piece occasionally rewards the wearer with 2 Golden Amber, as opposed to 1.



Here are directions on how and where to find "Love's Embrace" chest piece: https://www.gameclubz.com/immortals-fenyx-rising-aphrodite-a...'s,Adonis's%20Fall%20Vault%20of%20Tartaros.

The starting island has one of the best farming locations that I have found for your pre or post-game farming. Fast travel to "Messenger of the Gods" and there are plenty of patches of dead trees all around the island within short distances of each other with minimal enemies to fight.