El' Tross, Devasting Spark

Flying, haste, trample
When this card, enters the battlefield, each player exiles all instant and sorcery spells in his grave.
This card's power is equal the number of cards
exiled this way.
This card as deathtouch, while the number of permanent cards, in each player's graveyard is
bigger then, number of cards exiled by this card.
When this card, go back to command zone from anywhere, it deals
damage equal to your power to each creature.