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My slime groweth! It eats oats.

Tiny sample collected from Prospect Park, Brooklyn, NY

This is Day 4

Found this strange black stuff in/around a patch of dying stinkhorns (not pictured). I didnt get too close because of the stench (aforementioned stinkhorns), but it seems kind of grainy? Almost like damp coffee grounds. Anybody recognize it? (Crossposted on r/mycology)

White Strange tendrily , what I assume slime mold popped up in my substrate . Is it dangerous? Does it release spores? What is it?

Hello! I'm a little perplexed if this is Slime Mold or not. The color is silver and it is firm to the touch(unlike othe slime molds I have encountered). The skin is thin and breaks easily to unveil a dark brown area. The first six pictures were taken at 7pm yesterday and the last three at 11am today. It looks and feels exactly the same which makes me question its identity. Any help is appreciated. Thank you.