The Winged Dragon of Ra

Protection from Artifacts
Lifelink, Vigilance
Cannot Be Sacrificed
This card cannot be countered.
When this card enters the battlefield you can pay
X life, this card gets +X/+X where X equals
the life paid.
Pay 20 life: Return this card to the battlefield
from the graveyard, destroy target artifact.
Soon after, it emerged from its ashes with a burning vengeance. unwavering to the Phyrexians.