Stumbled across these black, finger-like things poking out of the mulch in my backyard. They are hard and creepy. Does anyone know what this is?

6. Common Myths and Mistaken IDs: What It’s Often Confused With
Dead Man’s Fingers is often confused with other types of fungi or plant structures due to its unusual appearance. It’s commonly mistaken for Stinkhorn fungi, which also have an elongated shape but differ in color and texture.
Another common confusion is with decaying plant material or roots that may also appear blackened and finger-like. These can be differentiated by their lack of a distinct structure or fungal characteristics such as spore production.
7. What To Do If You Find Dead Man’s Fingers on Your Property
If you find Dead Man’s Fingers on your property, there is generally no cause for alarm. Consider leaving them in place, as they play a beneficial role in breaking down organic matter and enriching the soil.