It draws you cards and slows down your opponent (Blue), and kills your opponent's creatures before they can cause a fuss (Black)
I really like Xande, Dark Mage (pictured above), because he and other creatures like him really want you to not be bashful about casting spells to gain card advantage
Using a whole card on a haste enabler is pretty dull, and does nothing if you end up on defense
Combine the massive dragon with purple cards such as Merlin, Goat or Yzma, Scary Beyond All Reason to pull them off the table, ready to be played again and reactivate their own powerful effects.
Power level - How well the cards play together in a standalone deck
Maleficent Monstrous Dragon (Enchanted) If youre looking for a villain card that scorches the battlefield and your credit card, this is it