Víbora membranosa (SP Patagia Viper)

Criatura — Víbora    (CMC:4)

Vuela.Cuando la Víbora membranosa entre al campo de batalla, pon en el campo de batalla dos fichas de criatura Víbora verdes y azules 1/1.Cuando la Víbora membranosa entre al campo de batalla, sacrifícala a menos que se haya usado para lanzarla.

197 C15 • SPChristopher Moeller

™ & © 1993—2015 Wizards of the Coast

Notes: TODO: Update Copyright

Legal in: Modern,Ravnica Block,Legacy,Vintage,Freeform,Prismatic,Tribal Wars Legacy,Singleton 100,Commander

Oracle Text (click to copy):

Patagia Viper {3}{G} Creature — Snake Flying When 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. 2/1

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View this MTG card on Gatherer

5/1/2006
If this enters the battlefield in a way other than announcing it as a spell, then the appropriate mana can't have been paid, and you'll have to sacrifice it.  

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