However, unlike other Dark Souls games, there are no other negative effects to the Hollowing process. The cost of this service is a Dark Sigil item and a Hollow stat on your character that increases every time you die. In addition to selling magic weaponry, Yoel will offer to draw out your true power, which essentially gives you one level without the need to use any souls. Approach Yoel and speak with him, then accept his service and he will appear in the Firelink Shrine, down the stairs behind the gentleman who you earned the collapse gesture from down the long hallway to the far left of the blacksmith and Greirat.
Yoel of Londor will speak to you as you approach this area. Go down to the very bottom of the stairs, clear out the Starved Hounds then head in the opposite direction, away from the gate, where there are a large group of dead pilgrims. A big question for many players is what is the cost of getting these free levels. Yoel of Londor has the ability to give you free levels by drawing out your true power in Dark Souls 3.