Corrosive Disruption

When Corrosive Disruption enters the battlefield,
select target creature opponent controls. When
that creature blocks, select one of your creatures.
The opponent's creature gets -{x}/-{x}, where {x} is your creature's mana cost.
If that creature would die this turn, exile it instead.
"Its really sad when you try to block someone, and you just die right there on the spot. No explanation, you just die.
And then you wake up in heaven. And your just like, 'Darn it!! That was stupid!!' Yep, it su