[I assume she's familiar with Mars Room ammunition, so this is the type of ammunition that would be loaded into the pistols there! As she's working it out of the wall, she may note that it's embedded at an upwards angle.

Sweeping the area nearest to the wall yields two things: there's some short black strands on top of the snow. Looking more closely, there are white strands, too, but they would be almost impossible to find without the black ones showing up.

There's also a sheathed sword (sheath bloody) not far from where the metal spikes end nearby.

Going back to the knife and blocks -- there isn't anything else notable about the arrangement here, other than that the blocks are clustered around the area with the spikes instead of spread out in there.]