To join Rosaria's Fingers in Dark Souls III, you need to find Rosaria's Bedchamber in the Cathedral of the Deep. Equip the Covenant of Rosaria item received from Rosaria to join the covenant. Offer Pale Tongues to rank up within the covenant and gain rewards such as spells and equipment.
Find Rosaria's Chambers
The first step to joining Rosaria's Fingers in Dark Souls III is to find Rosaria's Chambers. You can find her in the Cathedral of the Deep area. To reach her, you need to progress through the game until you reach the Cleansing Chapel bonfire. From the bonfire, head out and go down the stairs to the graveyard area. Continue through the graveyard until you reach a door that leads to the Cathedral of the Deep.
Defeat the Deacons of the Deep
Once you're inside the Cathedral of the Deep, you will need to navigate through the area and eventually reach the boss room where you will encounter the Deacons of the Deep. This boss fight can be challenging, especially if you are not adequately prepared. Make sure to have a good weapon and sufficient Estus Flasks before attempting to defeat the Deacons of the Deep.
Obtain the Small Doll
After defeating the Deacons of the Deep, make your way to the back of the boss room and pick up the Small Doll. This item is necessary to access Irithyll of the Boreal Valley, where Rosaria's Chambers are located. Once you have the Small Doll, head back to the Cleansing Chapel bonfire and proceed to the next area.
Reach Irithyll of the Boreal Valley
To reach Irithyll of the Boreal Valley, you need to go through the graveyard area again and reach the bottom of the elevator near the Cleansing Chapel bonfire. Take the elevator up and continue through the path until you reach the Irithyll of the Boreal Valley area. This area is known for its icy landscape and challenging enemies, so be prepared for tough battles ahead.
Find Rosaria's Bed Chamber
Once you are in Irithyll of the Boreal Valley, navigate through the area until you reach the church with a giant gate. Enter the church and proceed to the room with several kneeling figures. Among these figures, you will find Leonhard, who will provide you with the Lift Chamber Key. Use this key to unlock the shortcut back to the Church of Yorshka bonfire. From there, head outside the church and take the lift up to reach Rosaria's Bed Chamber.
Offer a Pale Tongue
Upon reaching Rosaria's Bed Chamber, you will meet Rosaria, Mother of Rebirth. Speak with her and she will allow you to join the Rosaria's Fingers covenant. To officially join the covenant, you need to offer her a Pale Tongue. You can obtain Pale Tongues by invading other players' worlds and killing them or by finding them as items in various locations throughout the game.
Benefits of Joining Rosaria's Fingers
Joining Rosaria's Fingers covenant in Dark Souls III offers several benefits. As a member of the covenant, you can invade other players' worlds as a red phantom to steal their tongues. You can also offer Pale Tongues to Rosaria to reallocate your stat points and change your appearance. Additionally, you can deepen your allegiance to the covenant by offering more Pale Tongues, which will unlock additional rewards and items from Rosaria.
By following these steps and joining Rosaria's Fingers covenant in Dark Souls III, you will gain access to unique gameplay mechanics and rewards that will enhance your overall gaming experience in the world of Dark Souls III.