Colors: What color or colors you want the card to be in
Whites Emeritus of Truce gets an honorable mention from me, since its prepared spell is Swords to Plowshares
The best sac outlets come on a cheap card, have no extra cost to use such as a tap or mana, have no speed restrictions upon their use, and are repeatable
Zell's ability to gain power for the number of lands you control also feels more green, though forms of have popped up in other colors, like the blue, white, and black Dakkon Blackblade
If you can force your opponent to spend their gold first on your turn, this is an 8/8 airborne blitz champion which frequently equates to a Flame Strike to the face with an expended, airborne, 8/8 body in play that can potentially draw a card next turn if attacking isnt the best play
We can certainly attribute Shark Typhoons popularity to the current Standard metagame midrange decks are everywhere, and this is a fantastic midrange card but lets not ignore the power of this card