At the blacksmith you can turn ashen flasks into estus flasks and vice versa. In your inventory you can see how many you have. This video guide shows them in the order in which they can be obtained (early game areas first, endgame areas last). None of them are missable! You can still get them after beating the final boss. It will let you survive longer and thus makes things easier for you. Since these are your health/mana potions it is highly advantageous to get them as soon as possible. Combined with the 11 estus shards this brings you to a total of 15 flasks. You start out with 3 estus + 1 ashen flask.
By giving them to the blacksmith in Firelink Shrine you can increase the number of Flasks you can carry. Finding all of their locations is needed for the Ultimate Estus Trophy / Achievement. There are 11 Estus Flask Upgrade Shards in Dark Souls 3. Reinforce the Estus Flask to the highest level. The Usurpation of Fire – Reach “The Usurpation of Fire” ending The End of Fire – Reach “The End of Fire” endingĥ.3. To Link the First Flame – Reach “To Link the First Flame” endingĥ.2.
Archdragon Peak – Reach Archdragon Peakĥ.1. Untended Graves – Reach the Untended Gravesģ.2.
