Optimus Maximus

+2: All creatures you control gain Lifelink and have First Strike. Optimus Maximus becomes indestructible.
-3: Sacrifice target artifact add 3 colorless mana to your mana pool.Lands you control don't need to be tapped to produce mana.
+6: All creatures you control have hexproof and can't be countered. They are indestructible. Destroy all Decepticons on the battlefield.