Oasis de la muerte

Text:

Siempre que una criatura que no sea ficha que controlas muera, pon las dos primeras cartas de tu biblioteca en tu cementerio. Luego regresa una carta de criatura con coste de maná convertido menor que el de la criatura que murió de tu cementerio a tu mano.
, sacrificar el Oasis de la muerte: Ganas una cantidad de vidas igual al mayor coste de maná convertido de entre las criaturas que controlas.

Rulings:

• 4/17/2020 Because the triggered ability doesn’t target the creature card in your graveyard, you may choose one of the two cards you put there from your library.
• 4/17/2020 If a creature on the battlefield or a card in your graveyard has <img src="/Handlers/Image.ashx?size=small&amp;name=X&amp;type=symbol" alt="Variable Colorless" align="absbottom" /> in its mana cost, X is considered to be 0.
• 4/17/2020 Use the converted mana cost of the creature as it last existed on the battlefield and the converted mana cost of the creature card as it exists in your graveyard to determine which cards may be returned to your hand. This may result in a creature’s death bringing itself back to your hand; perhaps it was one card of a merged creature, or it had become a copy of a more expensive creature.
• 4/17/2020 If Death’s Oasis becomes a creature, activating its last ability will cause its first ability to trigger.