Reverse Magic and or Reverse Attack
There is nothing better than seeing the smug look on an opponent's face as they throw down drain life or a fireball and then watching it melt away when you flip over a reverse card. Do that twice in a game and you can throw down a decoy and bask in thier indecision over risking another spell at you....
Reverse Magic doesn't help against Attack Spells, as they are not enchantments nor incantations. So while you could reverse that Drain Life, the fireball is going to roast your mage. Or do I have that wrong?
Reverse Magic:
When this creature is targeted by an incantation or enchantment spell controlled by an opponent, you must reveal Reverse Magic during the Counter Spell Step. You take control of that spell. Redirect it back to the caster, who now becomes the target of the spell. If the spell cannot target the caster, it is countered. Then, destroy Reverse Magic.