Drakon Silverbane

+2: Deal 2 damage to all Creatures or planeswalkers. Draw a card for each Creature or planeswalker damaged this way.
-2: Look at the top two cards of your library, If either is a Dragon Creature then cast it for free, If both are, cast both and put a +1/+1 counter.
-X: Drakon Silverbane becomes a Legendary Creature in addition to his other types until the end of turn. He gains +X/+X counters and Indestructible.