Instantly drawing a card at the fourth turn uses Merlin Rabbits trick, but gives you an alternative when you want something that might stick better
Blow is slightly better in control decks and Light slightly better for the aggressive decks
Then if it has power 10 or greater, draw a card." To double the number of +1/+1 counters on a creature, put a number of +1/+1 counters on it equal to the number it already has
The mana cost is likely to be as low as possible, since Magic Missile is a level one spell
While you dont want to help your opponents, you can make sure to stay ahead by having a five-cost character sing the card for free, leaving your ink open to cast those new cards you just drew.
It wasn't until a few years into its life that cards became readily available, and by then several sets had come and gone leaving powerful cards in the hands of the few who managed to get them at the time