How to upgrade your Estus Flask In Dark Souls 3
First you will need an Estus Shard and Undead Bone Shard then you need to travel to Firelink Shrine and make your way to Andre the black smith, scroll down to "Reinforce Estus Flask" and reinforce It as shown In the video.
After that continue on towards The Firelink Shrine bomb fire, rest and scroll down to "Burn Undead Bone Shard" click "ok" that will then increase the amount of HP/FP recovered when using The Estus Flask.
Hope you found this useful, Thanks for watching.
![](https://i.ytimg.com/vi/HlrwLb3pLpQ/maxresdefault.jpg)