Rares or mythics are best, because there are more foil copies of commons and uncommons floating around
Sadly there aren't many dinosaurs in blue, which may hamper the card's effectiveness
Fleecemane Lion is going to be a bit tricky to cast early anyway, and my guess is that the white works best here when it's just a light splash
Though this card costs $104 on average, other Vanellope cards can be found for pennies, so you can make use of the Shift mechanic, and get yourself a cheaper version of this card, without breaking the bank
Think of your own way of approaching this matchup along those two trains of thought, and you will prevail a high percentage of the time
4: Spider-Sense If [[Swan Song]] and [[Stifle]] had a baby, youd get Spider-Sense