Its a powerful finisher any of the top token commanders would gladly include in their decks
The token copies exactly what was printed on the original artifact and nothing else (unless that artifact was copying something else or was a token
FYI: "Tournament-legal cards have a width x height measurement of 2.5x3.5, or 63.588.9mm. When it comes to the thickness, non-foil cards are about 0.012, or 0.305mm, thick. Foil cards, on their end, are a bit thicker as they have an extra layer on top of the card that creates that shiny, holographic look. When it comes to the corners of Magic cards, theyre rounded at a radius of about 0.125, or 3mm."
It does come with a stipulation, as You Are Already Dead can only destroy a creature that was dealt damage
Any red/white deck is going to want Boros Charm, simply as a gotcha for when your opponent is convinced theyve won