The Maternal Staff is one of the many new weapons added in the Shadow of the Erdtree DLC. It's an excellent option for those looking to experiment with finger sorcery.
Location of the Mother Staff – Elden Ring Shadow of the Erdtree
This weapon from Elden Ring: Shadow of the Erdtree is a reward for a quest that is quite long, but easy to complete.
The Maternal Staff is located in the Manus Metyr Cathedral south of the Shadow Keep Church District. The easiest way to get there is to head to the Church District Highroad Grace and take the road to the left. You will see the cathedral in the distance right away, so just keep going and you should be there in no time.
To get the Maternal Staff, you will need to go through Count Ymir's quest. When you reach the final stage of the quest, you will have to challenge Count Ymir and his knight, Jolan.