you can use it only once during the match, and if your opponent manages to switch Aerodactyl through an Escape Rope or a Boss Orders, the effect will end, and you cant use it again
Its pretty good for getting the exact cards you need, providing you find them on the top of your deck of course
The 4 damage is better in Constructed than in Commander, but it is still 4 damage, and it's to a player
That card is multicolored no matter which half is cast, or if both halves are cast
Invasion was filled with mana fixing cards, other sets had their Rampant Growth effects and even multiple-color unfriendly Odyssey had common lands which could be sacrificed for a third color in a pinch
the next Im sketching anime characters, smacking cricket balls, or hanging upside down