Meet Abraxis.

Missable

After receiving the Flame Hollow from the Lord of Hollows, a conversation of Abraxis will come up. Although, the game will not lead you to him, you can find him by using serpent hole Scar - Drilling Annex. Continue forward and you'll notice a Storm whirlwind after fighting a brute and a bug. Float up and into the left. You'll find an enemy that manifests another, and if you go around the area, an armored demon with a Demonic Artifact near him. Step on the pressure plate, take the elevator up and meet him. You can choose to fight him or not. If you choose NOT to kill Abraxis, this will affect "A Parting Gift".

Note: You MUST confront the Lord of Hollows before defeating the Pride. Otherwise, you will NOT get the Lord of Hollows' final gift. Please see "A Parting Gift" for more info.