Elden Ring DLC | Rellana, Twin Moon Knight boss fight co-op w/2 cooperators on NG

Drops:
216,000 runes
Remembrance of the Twin Moon
Ring of Miquella (gesture)

Rellana, Twin Moon Knight
"Rellana, Twin Moon Knight is a Legend Boss in Elden Ring. A former princess of the Carian Royal family, she is the younger sister of Rennala, Queen of the Full Moon. Wielding her signature Twin Blades that she can infuse with Glintstone magic and Messmer's Flame respectively, she is fought at the end of Castle Ensis. This is an optional boss as players do not need to defeat her to advance in Shadow of the Erdtree."
https://eldenring.wiki.fextralife.com/Rellana+Twin+Moon+Knight

Remembrance of the Twin Moon
"Remembrance of the Twin Moon Knight is a Consumable Item in Elden Ring. It is a brand-new Remembrance in the Shadow of the Erdtree DLC. Most Consumables grant various effects such as restorative properties for recovering HP, removing certain negative status effects or applying temporary buffs and debuffs, while others can be thrown at enemies to deal damage."
https://eldenring.wiki.fextralife.com/Remembrance+of+the+Twin+Moon+Knight

Gestures
https://eldenring.wiki.fextralife.com/Gestures