Elden Ring - Shadow of the Erdtree | Ghostflame Dragon field boss with Mimic Tear on NG

Location: Just north of the Fort of Reprimand, which is along the southern edge of Scadu Altus

Drops:
144,000 runes
Dragon Heart
Somber Ancient Dragon Smithing Stone

Ghostflame Dragon
"Ghostflame Dragon is a Field Boss in Elden Ring. Ghostflame Dragon is a massive dragon with withered wings and exposed bones. This boss is found throughout the Lands of Shadow. This is an optional boss as players don't need to defeat it to advance in Elden Ring: Shadow of the Erdtree."
https://eldenring.wiki.fextralife.com/Ghostflame+Dragon

Dragon Heart
"Dragon Heart is a Key Item in Elden Ring. They are dropped from various Dragons across the Lands Between. Dragon Hearts are consumed at the Church of Dragon Communion, Cathedral of Dragon Communion, and Grand Altar of Dragon Communion to obtain Dragon Communion Incantations."
https://eldenring.wiki.fextralife.com/Dragon+Heart

Somber Ancient Dragon Smithing
"Somber Ancient Dragon Smithing Stone is an Upgrade Material in Elden Ring. Somber Ancient Dragon Smithing Stone strengthens special armaments to +10. Upgrade Materials can be acquired through exploration, looting it from specified areas of a Location, dropped by a specific Enemy or Boss, given by an NPC, or sold by a Merchant."
https://eldenring.wiki.fextralife.com/Somber+Ancient+Dragon+Smithing+Stone