Mists of Deception -- exploit??

[Chris_Byler]

If you can end a global by killing the caster, you should be able to end a battlefield enchantment the same way, IMO (and for item-autocast spells, by killing the item's wielder). Retreating is a bit more of a grey area, but because of this type of exploit, I think it's better to not allow battlefield enchantments by a retreater to stay in effect. (Call Horror x4, Returning is still ok though - once they get rid of the horrors the battle will end.)