Dark Souls 3: For this you need undead bone shards

The more health and mana points your character has in Dark Souls 3, the stronger your flasks need to be to restore lost points. For this purpose, you will need undead bone shards.

More is good: undead bone shards increase the effectiveness of your flasks.

The battles in Dark Souls 3 are so demanding that every single health point can make the difference between victory and defeat. That's exactly why undead bone shards are so important.

Dark Souls 3: Find and use undead bone shards

Following info about the undead bone shards:

• In total, you can collect ten undead bone shards. The effect of your flasks will be significantly stronger.
• You can find the shards little by little in the course of the game. The beginning makes the "Undead Settlement", the last shard is in the "Cathedral of the Abyss".
• Found shards you burn at the beacon in the Fireband Shrine to consume them and perform the upgrade.

It is advisable to use each found shard directly, because the effect is immediately available. You will directly benefit from the upgrade and this will make the upcoming tasks a bit easier - after all, in Dark Souls 3 every relief is welcome.