Hello @Superbadsal
Looks like to Two layers of Meshes. The outside mesh with skin using dissolve, the inside mesh the with metallic mat. The dissolved area appears to be switching physical material to trigger spark particles on impact. Several Youtubes Tuts for the Dissolve Effect. Several pre-created dissolve effects in the Marketplace (with a couple of laser effects: 1 & 2 ). In the second video you posted, the creator posted a link to the tutorial.