Moonshadow Mythic, 396 See
Our hopes
It doesn't counter the opponent's entire card, but it stops the strategy-crushing lifegain whilelike Searing Bloodadding to the "seven Lightning Bolt" total
On the other hand, others (myself included) are pro-leak, not in the sense that they want cards to be leaked (remember, pretty much everyone agrees that leaks suck, even the pro-leak group) but based on the argument that once a leak is public, the information should be available to anyone who wants it, in the interest of fairness and having an even playing field
For a finisher with villain flair, Bolass Citadel lets you cast off the top of your library by paying life instead of mana, then sacrifice 10 nonland permanents to drain each opponent for 10, a fittingly dramatic monologue before the win
The two abilities, naturally, also play very nicely together