Mists of deception make my 8 Marble Oracle dead?

[llamabeast]

I haven't had a chance to look at the turn yet, but will work under the assumption that Cipher's opponent was simply innocently using MoD as it was intended, a powerful battlefield enchantment. Unfortunately, because of the bug whereby retreating casters don't have their enchantment's cancelled (and because Cipher managed to rout his opponent), the spell rather unfairly decimated Cipher's army.

I'm not sure what to do about this. Neither rehosting nor not rehosting seem entirely fair. I'm beginning to think this spell should just be banned outright, since it can cause this kind of problem even when used in good faith. Does anyone have any thoughts as to what I should do?