DARK SOULS III
43 Achievements
1,000
80-100h
Covenant: Rosaria's Fingers
Discover Rosaria's Fingers covenant. Details for this achievement will be revealed once unlocked
15
25.43%
How to unlock the Covenant: Rosaria's Fingers achievement in DARK SOULS III - Definitive Guide
By working your way through this area, you'll eventually unlock shortcut doors on either side of the Cleansing Chapel bonfire. Take the door on the left and there will be a lift on the left side that takes you to a tower where an enemy was shooting you with a crossbow. Go around the outside of this tower and climb a ladder to the top level. From here, you can drop down to a slanted ledge below and work your way up to another roof and eventually inside the building and onto some rafters high above the large room with two giants. There is a spot on the other side that you can drop down to and if you follow the path, you'll be up on the side that you couldn't reach before. There will be a set of doors that you can open that leads to a bonfire and Rosaria, the NPC for this covenant.
Interact with her to "discover" the covenant.
Per Minihub in the comments:
You will enter the tomb with the Cathedral Grave Warden who wields a crossbow. Kill it and proceed outside and to the left, hugging the wall. You will find a ladder, climb it and proceed through the room, killing the Devout of the Deep.
Continue forward by rolling onto the roof of the support beam. Proceed along the roof until you see a opening to the left. Enter the opening to reach the rafters. Head to the other side of the rafters, avoiding the Knight of the Deep and roll onto a platform next to one. Continue forward, watching out for the Man-grubs that attack you. Proceed to the right up the stairs and enter the bed chamber to Rosaria, Mother of Rebirth.
Here's a video playthrough
Found in the Cathedral of the Deep.
WARNING: Asking to join this Covenant ends any interaction you can have with Sirris.
You need to make your way through the cathedral until you get onto the highest roof, up here there are opening on the left that lead to the rafters – make your way across to the far side (watching out for enemies) and look for a ledge you can drop to. Do so and follow this path past a bunch of worm enemies and up some stairs, you’ll find more worms ahead. Kill them and go in the door on the right to find this covenant.
You need to get this Covenant to Rank 1 in order to acquire a unique ring, which requires 10 Pale Tongues. You can get three naturally: one in the Undead Settlement on a dangling corpse near where you fought the fire demon, one on a corpse by the chained giants in the cathedral of the deep and another on a corpse near to where you entered the rafters to get here. You can also get them by killing other phantoms/hosts as a member or farming the Darkwraiths in Farron Keep. Spawn at the Keep Perimeter bonfire, go back outside and then left to find two Dark wraiths, which the enemies in this area will also attack. The drop rate is roughly one in thirty if you have the Symbol of Avarice, Golden Covetous Serpent Ring and use a Rusted Coin.
However, if you suddenly missed it, there is always NG+. Moreover, you will have to go through the game more than once.
Fingers of the Rosary Covenant Location
The goal is attacking. Invade other worlds using a red eye, or use a red chalk to challenge you to a duel. As soon as the owner of the world is defeated, you will receive 1 language.
Keep in mind that in addition to mobs, both blue and purple phantoms can kill you.
10 languages. Reward - Obscuring Ring
30 languages. Reward - weapon "Man-Grub's Staff"
https://youtube.com/watch?v=XlDB68QC9FM