Elden Ring PC | Decaying Ekzykes boss fight co-op w/summoned Mimic Tear Ashes on NG

Decaying Ezykes is a dragon boss located in Caelid on the road along the Southern Aeonia Swamp Bank, just north of the Cathedral of Dragon Communion.

Drops:
45,600 runes (20% runes bonus since I was wearing Golden Scarab talisman)
Dragon Heart

Decaying Ekzykes
"Decaying Ekzykes is a Greater Foe Boss in Elden Ring. This dying dragon is infected with Scarlet Rot, but can still pose a dire threat to unwary travelers. This Elden Ring Decaying Ekzykes Guide features boss locations, tips, strategies and videos on how to defeat Ekzykes easily, as well as boss stats and lore for Ekzykes. Bosses are unique and challenging Enemies that can be encountered all over the Lands Between. Great Enemy bosses can drop unique Spirit Ashes, Weapons, Spells, and other various Items. This is an optional boss as players are not required to defeat it to advance in Elden Ring, but it provides useful Items as well as Runes upon defeat."
https://eldenring.wiki.fextralife.com/Decaying+Ekzykes

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

Mimic Tear Ashes (summons a phantom NPC copy of you)
"Mimic Tear Ashes is a Spirit and Summon in Elden Ring. Mimic Tear Ashes summons mimic tear spirit."
https://eldenring.wiki.fextralife.com/Mimic+Tear+Ashes