Yes, it'll sometimes help out your opponent just as much as you, but the fact is you can pick your moment, using it when you have more cards in hand to get the most value from it
You cannot win with counter magic alone, the deck of only counterspells beats nothing
Many cards contain text that requires you to flip a coin to determine whether it's successful to give a sense of randomness and balance to specific moves, but almost every player uses a die instead of a coin
Perrie, the Pulverizer I kinda like what Perrie, the Pulverizers putting down
Cook up your opponents monsters and serve them a fullcourse meal that fights back
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