Dark Ember | Dark Souls

Dark Ember is an Ember in Dark Souls. Embers are key items given to blacksmiths to unlock specific weapon upgrade paths. Once you provide the appropriate ember to a qualified blacksmith, that upgrade becomes permanently available for any suitable weapon, provided you have the necessary materials.

Ember required for weapon ascension. The church long hid the forbidden black ember, and no living blacksmith knows of it.
Ascends +5 divine weapon to occult weapon. (occult weapon can be reinforced to +5)
Occult weapons were used to hunt the Gods, and are effective against their followers and kin.

Dark Ember Location in Dark Souls and Dark Souls Remastered

• Painted World of Ariamis. This Ember is found inside the Annex, for which you need the Annex Key to enter.
• It is guarded by two Engorged Zombies.

Dark Souls and Dark Souls Remastered Dark Ember Usage

• Given to Blacksmith Andre to modify +5 Divine weapons into Occult weapons.
• Can be given to Andre at any time.

Note & Tips about Occult

• It isn't the same thing as divine. Divine excels in fighting undead and things that have no soul anymore, like skeletons and such. Occult is a whole other type of reinforcement, it excels in fighting living things that have souls, like a lot of enemies in the game (especially Black Knights and Silver Knights, which take extra damage).
• Note that NO extra damage is done by occult to invaders, hosts or phantoms in PvP.