Discus Buttons

These flat, circular silver buttons (10) may be
sewn onto a vest or jacket.
As a bonus action the you can speak a command
word to detach and enlarge a single button,
becoming an 8-inch disc. As an attack action you
can hurl the disc at a target. Each disc has razor
sharp edges that deal 2d6 damage on impact. The
full size discs may be thrown up to 200 feet, are treated as a +2 improvised weapon and
disintegrate on a hit or miss.