Baal, Dreadking

Indestructible, haste, protection from all flying, deathtouch, trample, lifelink, Unblockable
whenever Baal attacks you gain 7 life. When you cast Baal, You may play up to 10 dragons from your hand, deck, or graveyard without paying its mana cost.

Other dragons you control get +5/+5.
Void Beam: {r}{w}{u}{3} Destroy target permanent. This spell can not be
countered. Cast this ability only as a sorcery
* Is the total power of dragons on the battlefield times three.