Many retailers were initially reluctant to even stock the cards, which is why widespread retail distribution didn't really happen until March or April 1999
So basically, from a store's perspective, because this was a casual event with no prizing, we didn't fear anyone using proxies, or alt art, or gold-bordered cards
Combat Celebrant: Wow, as in really a positive 'wow.' It can die the first time you Exert it, but if you time it right, this is the card that will win you the game
Silver Myr is ramp in a color that doesnt get access to a whole lot
It's likely there's some redundant effect you can do without, but if you're really not sure, you can leave the extra card around
Services like PSA and BGS authenticate the card as part of the grading process