Mohg, the Omen is an optional boss encountered within the Cathedral of the Forsaken, located in the Subterranean Shunning-Grounds. This ancient site lies just down the stairs from the Forsaken Depths Site of Grace, serving as the lair for this malevolent entity. To confront this ominous adversary, players can opt for a multi-player approach, allowing them to summon Spirit Ashes to aid in battle. Alternatively, they can enlist the help of Dung Eater, an NPC who can be summoned if freed from his cell. Although vanquishing Elden Ring Mohg, the Omen is not mandatory for progression, it is a crucial step for unlocking a specific ending. Players should prepare themselves for a challenging encounter, as this boss is known for its fierce attacks and cunning tactics.

WHEN DO YOU KILL MOHG ELDEN RING?
This is a frequently asked question that could be referring to either the Mohg, Lord of Blood or Mohg, the Omen. Both bosses are optional so there is not a specific time that you will need to kill either of them. This Mohg the Omen is not optional for at least one of the Endings in the game, but is overall still an optional Bosses and does not need to be completed to progress through the other Endings in th game. He and can be encountered in the Subterranean Shunning-Grounds in Leyndell, Royal Capital. This area is accessible by descending the stairs at the Avenue Balcony Site of Grace and immediately turning left out of the double grate doors. First walk to the railing, and then move northwest until the rooftops are directly to your left. Hop over the railing onto the rooftops, then descend into the plaza. From the plaza's center, face due North. The well's wooden structure will be visible between a dilapidated ruin and the walkway.

As you make your way through this Location, make sure you pick up Mohg’s Shackle which can greatly help against your upcoming Boss encounter. It will be guarded by 2 Giant Crayfish. View the Video location for visual guidance on this item's location. As you get through this area, you may encounter the Dung Eater and eventually you will find your way to the Cathedral of the Forsaken. Once you activate the Forsaken Depths Site of Grace and directly ahead is Mohg's room where you can get a chance to face him.