Name:Sphere of Duty
ManaCost:3 W
Types:Enchantment
S:Mode$ PreventDamage | Target$ You | Source$ Card.GreenSource | Amount$ 2 | Description$ If a green source would deal damage to you, prevent 2 of that damage.
SVar:RemRandomDeck:True
SVar:Picture:http://www.wizards.com/global/images/magic/general/sphere_of_duty.jpg
Oracle:If a green source would deal damage to you, prevent 2 of that damage.