Patagia Viper

Flying
When this creature enters, create two 1/1 green and blue Snake creature tokens.
When this creature enters, sacrifice it unless {U} was spent to cast it.

Flying
When Patagia Viper comes into play, put two 1/1 green and blue Snake creature tokens into play.
When Patagia Viper comes into play, sacrifice it unless {U} was spent to play it.

The List

Commander 2015

FlyingWhen Patagia Viper enters the battlefield, put two 1/1 green and blue Snake creature tokens onto the battlefield.When Patagia Viper enters the battlefield, sacrifice it unless {U} was spent to cast it.