Blue-Eyes Shining Dragon

Flying, shroud (This creature can't be blocked
except by creatures with flying and/or reach, and it
can't be the target of spells or abilities.)
As an additional cost to cast this spell, sacrifice a
white Dragon creature.
Blue-Eyes Shining Dragon's power and
toughness is each equal to the number of
Dragons on the battlefield plus the number of
Dragon cards in all graveyards.