Most kids might have asked for this solely for the promo Pokemon TCG Jigglypuff card which like a year later they gave away for free at the Pokemon Trading Card Game league
However, this feels quite basic, and while no pre-con is going to be massively overpowered out of the box without a few upgrades, it just feels like this deck needs something more to aid its versatility
Wizards also refuses to print cards that violate the spirit of the policy by changing only inconsequential details
If, during a player's declare attackers step, a creature that player controls that's been goaded is tapped, is affected by a spell or ability that says it can't attack, or hasn't been under that player's control continuously since the turn began (and doesn't have haste), then it doesn't attack
All the rare cards in the Base Set were printed in equivalent numbers (not counting those that were packed into starter decks), so in principle, there isn't a single rarest shadowless card