Plasma Dragon

Flying, Lifelink
{r}: Gain life equal to the mana you have used
so far this turn. Use this ability only once a turn.
{u}{u}{u}: If opponent has possession of a dragon
creature that has greater power and toughness
than this creature, put it at the bottom of your
deck. If you draw that card, you win the game.
{g}{b}: This creature gains +2/+2 if you have
more than two dragon creatures in your
graveyard.