Starrix propicio (Auspicious Starrix)
Starrix propicio 

Siempre que esta criatura mute, exilia cartas de la parte superior de tu biblioteca hasta que exilies X cartas de permanente, donde X es la cantidad de veces que esta criatura ha mutado. Pon esas cartas de permanente en el campo de batalla.
Texto de reglas (Oracle, inglés)
Whenever this creature mutates, exile cards from the top of your library until you exile X permanent cards, where X is the number of times this creature has mutated. Put those permanent cards onto the battlefield.
Legalidad
Aclaraciones de reglas (en inglés)
2020-04-17
If an Aura is put onto the battlefield without being cast, the Aura’s controller-to-be chooses what it will enchant as it enters the battlefield. An Aura put onto the battlefield this way doesn’t target anything (so it could be attached to an opponent’s permanent with hexproof, for example), but the Aura’s enchant ability restricts what it can be attached to. If the Aura can’t legally be attached to anything, it remains in its current zone.
2020-04-17
An Aura being put onto the battlefield this way can’t enchant anything else that is being put onto the battlefield at the same time.
2020-04-17
Auspicious Starrix’s effect doesn’t count as playing lands. It can put land cards onto the battlefield even if it’s not your turn or if you’ve already played your land for the turn.
2020-04-17
If there are fewer than X permanent cards in your library, you exile your entire library and put the permanent cards in it onto the battlefield.
2020-04-17
Any cards that you exile but don’t put on the battlefield for any reason (for example, because the card is an instant card or an Aura that can’t enchant anything) remain in exile.


