Phoenix Down
Artifact
Oracle Text
, 
, Exile this artifact: Choose one —
• Return target creature card with mana value 4 or less from your graveyard to the battlefield tapped.
• Exile target Skeleton, Spirit, or Zombie.
Flavor Text
A feather with the power to revive those who have exhausted their strength.
in its mana cost, X is 0 for the purpose of determining its mana value.