Mask of Memory remains one of the better options for card draw for decks not in green or Simic, and I love putting it on small evasive beaters
Animate Dead, for example, is weaker to removal, but a lot easier to use in a combo
This helps lock in the card's value and makes it easier and safer to ship when you eventually sell it
According to the Magic: The Gathering Wiki page, " World Championship Decks were specifically packaged versions of four of the top ranked decks used during the World Championships released by Wizards of the Coast for the years 1997 through 2004." The Wiki entry goes on to explain these cards were produced with gold borders and a different Magic back
In fact, it was often used in red decks to battle blue ones when it was Standard-legal
The same is true for first strike, double strike, deathtouch, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance