Blue Eyes White Dragon

Flying, vigilance, lifelink.
Your opponents can't target this card with spells
with converted mana cost X or less, where X is
the difference between your life and theirs.
A deck can have up to three copies of a card
named Blue Eyes White Dragon.
This legendary dragon is a powerful engine of destruction. Virtually invincible, very few have faced
this awesome creature and lived to tell the tale.