Once the triggered ability has triggered once during a turn, it can't trigger again, even if the triggered ability is still on the stack, has been countered, or has otherwise left the stack
In fact, its pretty easy (I wonder if I ever say differently about a card): If you are about to pay for a spell less than 3 mana, you get to pay 3 mana
That player draws a card at the beginning of the next turn's upkeep
As a kid I often preferred to read rather than play with the other kids, I was terrible at sports in P.E
Vorpal Sword is perfect for any deck running black that likes to go into the red zone
It currently trades in the $60 range, and many collectors consider it the aesthetic pick of the set