The Bottomless Well Amber sits in a hidden chest in the very first area of Valor Mortis, tucked behind a burnable barrier on the snowy cliffside. You can collect it during the prologue the moment you gain the Fire Transmutation, long before most players realize backtracking is already possible.
Quick answer: Get the Fire Transmutation from the tutorial cutscene, backtrack to the snowy branch section near the first Lantern (Onslaught Arch), burn the orange fleshy growth against the cliff wall, and open the red chest behind it.
What the Bottomless Well Amber does
The Bottomless Well Amber gradually restores spent Nephtoglobin as time passes. Nephtoglobin powers your Transmutations, and this automatic refill sustains Fire and your other abilities without using a Vial.
It is a three-level Amber, starting at Upgrade Level 1 / 3. Finding additional copies later in the game upgrades the one you already hold rather than giving you a duplicate.
Picking the Amber up early does not mean you can use it right away. Amber slots unlock through the Lantern upgrade track, and the first slot opens at Level 5. Until then the Amber sits in your inventory, ready to equip once you reach that milestone.

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The route relies on first unlocking the Fire Transmutation, then returning to a spot you have already passed. Follow the opening tutorial as normal, then double back.




Confirming you have it and equipping the Amber
Opening the chest adds the Bottomless Well Amber to your inventory immediately. Check the inventory menu and you will see it listed at Upgrade Level 1 / 3 with the Nephtoglobin regeneration description.
To actually use it, rest at a Lantern and open the Level Up menu. The Amber slot stays locked until you hit Level 5 on the Lantern upgrade track, so keep leveling as you play through the opening hours. Once the slot opens, interact with a Lantern to slot the Amber in.

With the Amber claimed this early, you already have a steady Nephtoglobin drip waiting for the moment the slot opens, which makes leaning on the Fire Transmutation far easier through the first stretch of William’s journey.






