^^agreed, from the top it slightly resembles cubes but if you took them out and showed the stems and checked if they bruise a greenish blue, and have a ring and the spore print is purple then it would be a higher chance of being cubes, but the stems do look pretty dark, so its doubtful...try cow pastures

you need more pics but those donot look like cubes, the stems look black and no veil visible and way too discolored.