Aerodactyl

Flying, unleash
When combat damage is dealt to an opponent you
may cast Aerodactyl from your graveyard.
When Aerodactyl enters the battlefield it gains
+X/+X where X is the amount of life lost this
turn. Lose X life.
Ancient Power {b/r}{b/r}{b/r}{t} Sacrifice an artifact, deal
damage equal to it's cmc to target creature.