You can either accept the offer or decline it
In a blog post, Wizards gave the example of Omnath, Locus of Creation, a previously banned card that will be reintroduced with an additional mana cost and an altered ability (it will now let you scry one card instead of drawing a card)
That metaphor works both ways, too Im sure youve played against the control player who runs nothing but board wipes, right
There are plenty of options out there, but the ones weve chosen are fairly cheap, not too big and should be easy to get
Perhaps the best thing you can do with all that mana, besides dumping it into a massive Finale of Devastation, is to put all that mana into a Helix Pinnacle, which once you put 100 mana into it, you just win the game
And can we find a way to beat them without joining them