Instants are especially helpful because they let you set up neat plays where Gandalf can block a creature, then return to your library before damage, fogging the attack while keeping Gandalf protected for your next turn, where it can re-utilize previously used effects
In fact, I considered at one point making every card a proxy just to be consistent
Playing artifacts pumps up Tidus, Blitzball Star, makes Gaelicat into a formidable threat, or even draws you a ton of cards later with Edgar, King of Figaro
The first Fairy-type Eeveelution, it evolved from Eevee through high affection while knowing a Fairy move
Head Noiser is brilliantly complex, and it and Jamming Net are the first Trainers that can be played on your opponents Pokmon
The number of times you actually draw Urza during the draft matters, and too often the Rube Goldberg board states are easy to break up with even the most trivial of disruption