name=Iona, Shield of Emeria
image=http://mtgimage.com/card/iona%2C%20shield%20of%20emeria.jpg
value=2.500
rarity=M
type=Legendary,Creature
subtype=Angel
cost={6}{W}{W}{W}
pt=7/7
ability=Flying
timing=main
requires_groovy_code
oracle=Flying. As Iona, Shield of Emeria enters the battlefield, choose a color. Your opponents can't cast spells of the chosen color.
# unable to prevent opponent from casting spells of a specific color