Right of Birth

{W}
Enchantment
Whenever a creature comes into play, if it wasn't played from its controller's hand, remove it from the game.
***
I was playing a game with some friends earlier and we realized that a lot of there are a lot of ways to get creatures into play without casting them -- reanimation, Tooth and Nail, AEther Vial, etc. It seems natural that there should be a hoser against cards that disobey the "right" way to get creatures into play. It seems like a card that is heavily associated with white. The idea of showing a bias for creatures brought into play the "natural" way is either white or green and the idea of penalizing something that's unnatural is definitely within white's tendency to make laws. I'm not really sure how to cost this. On one hand, it's really potent against a deck like Tooth and Nail, Oath, or Reanimator, but it's dead against many other archetypes. I want it to be cheap enough to be playable, but not so easy to splash that it can
always be put into play early enough to shut down the decks it hoses.