Elden Ring PC | Flying Dragon Greyll boss fight co-op w/1 summoned player on NG

Drops:
60,000 runes
1x Dragon Heart

Flying Dragon Greyll
https://eldenring.wiki.fextralife.com/Flying+Dragon+Greyll
"Flying Dragon Greyll is a Greater Foe Boss in Elden Ring. It guards the bridge south of the Bestial Sanctum. This is an optional boss. This dragon is simply a stronger version of Agheel in a rather narrow arena, never straying far from the greatbridge."

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