The real power comes from Shadowfaxs ability to take a creature card from your hand with lower power than Shadowfaxs four and put it directly into play tapped and attacking when Shadowfax attacks
Even today, this card's powers are impressive
Once Brotherhood Spy's ability has resolved, removing the legendary Assassin (or Assassins) you control from the battlefield or causing them to lose the legendary supertype or Assassin subtype won't cause Brotherhood Spy's ability to stop applying for that turn
U/G is an extremely potent color combination, thanks to the combination of big creatures, mana ramp and card draw, and Tishana provides everything a deck could want in spades, with her only requirement being a battlefield full of creatures
Moon Girl and Devil Dinosaur's first ability will overwrite any previous effects that set Moon Girl and Devil Dinosaur's power and toughness to specific numbers
Being able to cast two spells a turn should be achievable in most decks, and regardless of whether youre ramping into an expensive or early commander, youll want to be playing some amount of ramp to make this happen
