Nebular Mindfading

Counter target spell. Nebular Mindfading costs
{x} less, where X is that spell's converted mana
cost. If a spell is countered this way, exile it
instead of putting it in it's owner's graveyard.
Memory is all we are. Moments and feelings,
captured in amber, strung on filaments of reason.
Take a man's memories and you take all of him.
Chip away a memory at a time and you destroy him
as surely as if you hammered nail after nail through
his skull.