Name:Sphere of Safety
ManaCost:4 W
Types:Enchantment
S:Mode$ CantAttackUnless | ValidCard$ Creature | Target$ You,Planeswalker.YouCtrl | Cost$ X | Description$ Creatures can't attack you or a planeswalker you control unless their controller pays {X} for each of those creatures, where X is the number of enchantments you control.
SVar:X:Count$Valid Enchantment.YouCtrl
SVar:Picture:http://www.wizards.com/global/images/magic/general/sphere_of_safety.jpg
Oracle:Creatures can't attack you or a planeswalker you control unless their controller pays {X} for each of those creatures, where X is the number of enchantments you control.