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?

also trigger their appearance as the climate becomes more favorable for fungal activity.
5. Is Dead Man’s Fingers Dangerous to People, Pets, or Plants?
The good news is that Dead Man’s Fingers is not harmful to humans, pets, or plants. While the appearance might be unsettling, this fungus does not pose a threat through touch or proximity. It is not considered edible, however, due to its tough texture and unappealing taste.
For plants, the presence of Dead Man’s Fingers is not detrimental as it primarily targets dead matter for decomposition.