Elden Ring PC | Godfrey, First Elden Lord boss fight co-op w/2 summoned players on NG w/achievement

The amount of runes acquired from a boss will be different when you have summoned players with you and whether or not you're wearing the +20% runes bonus talisman (Golden Scarab talisman).

Drops:
72,000 runes
Talisman Pouch
Godfrey, First Elden Lord achievement (Steam / PC)

Godfrey, First Elden Lord (Golden Shade)
"Godfrey, First Elden Lord (Golden Shade) is a Great Enemy Boss in Elden Ring. This is a spectral shade of Godfrey that is encountered in Leyndell, Royal Capital. This is not an optional boss as players must defeat it to advance in Elden Ring."
https://eldenring.wiki.fextralife.com/Godfrey,+First+Elden+Lord+(Golden+Shade)

Talisman Pouch
"Talisman Pouch is a Key Item in Elden Ring. It increases the number of Talismans the player can equip at once, up to a total of four. Key Items in Elden Ring include a wide variety of items found in specific locations or are given by a related NPCs which are used to unlock areas, quests, and to further progress the game's story."
https://eldenring.wiki.fextralife.com/Talisman+Pouch

Godfrey, First Elden Lord achievement
https://www.trueachievements.com/a354510/godfrey-the-first-lord-achievement